No I couldn't afford that either if it gets much colder I'm going to have to convince my parents to let me bring Mona indoors OR I can set her up in the rabbit shed seeing as the rabbits are indoors but I don't think she'd much like that
It would be lovely if your parents would let you adopt her! The only thing I can think of, if they are adamant that she can't come indoors, is a catflap on the shed door so she could have access to a warm bed.