lol i reread my post and noticed i said more roof instead of more room. but yeah the brace that we put in our coupes is actually a sedan part. most people don't know this though.
but yeah, the roof skin is thin, but it's not like it's really thin. it's about as thin as my stock fenders are. it's just that since it's a really large surface area, it feels weaker than any other part. at least off the car anyways. when it's on the car, it feels sturdy. my bodyshop was able to take the whole skin off without destroying it (there is a dent, but that was from me lol) like how all the other DIYs say would happen. i swear all the other shops or people that DIYed it got lazy and tried to rip it off too early and end up destroying it.
i'm sure you could get it done for less than 1k no problem. offer to take the headliner off yourself, so you could save even more money.