How about your room? I would hope the parents would be understanding and caring enough to let you use your own bedroom space how you want. And like everyone else has been saying, it does seem weird that your parents can smell the snakes. If you keep them on aspen and clean up poop, there really shouldn't be any odor at all usually. I have noticed my snake and viv smelling a bit these days, but I have been trying to get my stubborn hatchling to eat bloody gorey pinky parts and not stressing him out with a bath after. Maybe try bathing your snakes after they poop? I cover my viv with T shirts to give my snake more security and also keep the heat in, and it has the added advantage of keeping the smell in, but even without the T shirts I don't smell anything in the room, unless I go stick my face over the viv.
But I know, convincing irrational parents with unreasonable requests isn't always that easy. I hope they will let you continue housing your snakes in the house with acceptable temperatures and humidity, and maybe trying various odor controlling techniques will help. If they are uncompromising, it is probably better to rehome the snakes (and yourself eventually when possible) than put them in 90F+ conditions that will cause them health problems.
A lot of times smell is psychological for people. If they happen to not like the snakes or are afraid or something, they could well be smelling something that does not exist. In that case, maybe it would help if they can't see the snake or vivarium? If you use aspen, is it the aspen smell they dislike and have they associated it with the snakes? Maybe, if it is an emotional thing, "switching" brands or kinds of bedding and telling your parents all about how the new kind is great for odor control (which aspen is), will help.
I'm still living with my parents too, and there can be lots of friction at times, especially about my snake and its feeding. My mom is the least fond of snakes, but my dad is the most afraid of germs and squicked out by the frozen mice. Honestly, my best hope is to move out as soon as I find an affordable place, but in the meantime I've found a few ways to cope. My snake stays in my room, and I try to minimize conflict about it. I usually feed after they go to sleep, and I do extra dishes and cleaning around those times so they'll associate positive things. Then I get annoyed at the double standards, bite my tongue, and go to apartment websites, but that's a different story.
Good luck to you and I hope you work it out!