So far my Rebif has remained at expensive but affordable levels, due to insurance. If I didn't have insurance right now I don't know what I'd do. There's no way we could afford the total cost (about $1600 per month, I think) and I'd be having to contact Serono/Pfizer/Merck or whoever and asking for some kind of assistance. Or maybe your chapter of the National MS Society would help. Don't know.
It is expensive. No doubt.