BAD idea! Avoid like the plague!
Friend of mine has just surrendered hers on her solicotors advice! She had it with two years and had agreed a fixed price(which they all do) first day! This price was fixed at something like 250k AFTER paying two years rent on top of that and kitting it out top to bottom! Turns out the house 3 doors down recently sold for 168k at a push.
She had to walk away from it and move back in home while the developer is chasing her for walking away from the contract!
I'd warned her about this exact eventuality first day but she refused to listen and is now up shit creek having signed the contract and pumping a fortune into kitting out the house!