There really isn't an alternative as safe or reliable as getting your cat spayed. My advice would be to keep her indoors (especially when she goes into heat) until you can save up the money to get the operation done.

Tera:Yeah, I try to keep her indoors as much as possible, but her toilet is outside so...

F2L: I never saw those...

Um, I have a kitty toilet but it's outside, mom doesn't allow us having it inside, and I won't take her on a leash... Because... It's so wrong :|

There is nothing wrong with having a cat on a leash. In fact, it's often in their best interest while outside the home - especially if they are not normally outdoor cats.
I use a leash and harness with both of my cats, and they escape the stress of being forced into a tiny carrier any time we need to travel. The leash and harness go fun places like the porch, as well as to the vet, so neither of my boys minds wearing the harness.
This way, I can be sure that when they are outside, I can control their environment. If a car goes by and spooks them into the bushes, they aren't lost forever. My cats are strictly indoors and wouldn't know how to find their way back home again, and I live near a busy road where I see dead wildlife AND domesticated animals such as cats and dogs on an almost weekly basis.
It's not wrong, it's responsible. If you can't handle kittens, you need to control her environment to protect her until she can be spayed.

Like the other folks have said, there are usually spay and neuter clinics in most areas, and they will do the procedure for a lower cost. If money's tight, that may be your best option.

For an opinion? Pf, no.
A leash doesn't have to be restricting, though. My cats are perfectly happy hunting bugs in the grass with me tagging along four feet behind at the end of the leash. As long as I move with them, they can go wherever they want aside from the street and into the neighbors' yard with the dog.

All I can contribute is that... if you don't want her to have kittens(as you cant afford to spay, even), then you guys are going to have to figure something out. If people complain about a leash/harness, let them, you're being responsible, and it would be irresponsible to take the risk in pregnancy when spaying is an issue already.

I'm in the same boat as you, Z.m D: The vet charges about $95 for spaying a cat, and our animal shelter is shutting down because our stupid city doesn't want to pay them anymore. The result is stray cats everywhere, and my fair share of unexpected kittens. Luckily I haven't run into any real problem finding them homes, and there's a traveling vet clinic that comes by every month or so to offer low-cost vaccinations. Still, I have ended up keeping one or two who simply wouldn't have a chance of being adopted; one of them has a chronic cold (killed the rest of her litter a week after birth) with a mutated eye and an eating disability. I love her to death, but she's quite expensive to care for.

Anyways, you may try investing in some fencing material. Most of the stuff my family gets comes free or low cost from people who just want to get it off their lawn. I'm in the process of making a large enclosure to put my girls in when they're in heat. I'd keep 'em in the house if I could, but they're too annoying xD You could probably make a smaller one wherever the litter box is kept (it's not as hard as it sounds ).

I like the leash idea- keep in mind this wouldn't be all the time, just when you notice she's in heat. I'd warn against making her wear the harness unsupervised though. It can be quite a danger to outdoor cats. One of my mother's friend was horrified when her cat disappeared for three days during a snowstorm. They finally found him, stuck in a bush that his harness had caught on, and the vet couldn't revive him

That's wrong. It's preventable in the first place, even without spaying, heh.

I understand, and I'm not trying to personally attack you over it.

I guess, even the thought of it, is a sensitive subject for me. - I wish I had an inexpensive solution, because even though living in a tiny town, shooting when it could be prevented, doesn't make it right. - I partially want to say that... the cat shouldn't be in your guy's care if you can not prevent pregnancy when you can not afford it; whether it be spaying, or some other method to prevent it, or are simply unwilling to prevent it. When getting an animal you have to look at all aspects; injuries, illness, pregnancy. These could all happen. If one can not afford to take care of an animal and the money to potentially be invested due to one of the above or more reasons, than they shouldn't take on the responsibility of having an animal. - I'm not trying to sound mean... it's just the truth. - I understand you're 12, and you can not do a lot... I can't really say you're the one to blame.

Perhaps consider finding the cat a home that can afford to provide everything for it.

I don't know if anyone has mentioned this, but look for a specific day of when spays and neuters are free.

Like a free day or something, or a discount day...I don't know.

I've heard of them being on certain days. I'm not sure what places this qualifies for/
I heard about one that comes around March, or April a long time ago, but I don't know what state or place that was at, so I don't know.

Good luck, though.

Jala: I will look for it, thank you ♥

MrsMorbird: Yeah... Well, mom of course does give me a little amount of money some times, and I buy food for the cat for it, I don't mean to be stupid or anything but... Aren't food and drink the main prioritys of owning a cat? And I brush her every day too.
Oh, we walked away with a 700kr bill from the vet once too, but it was the dog that needed meds.