Hey Jul!
Dun source to many also, will get more confused! Since the ID has done ur friend's house, guess it's safe in a way.
Yes, make sure, he quotes u everything in a list, one item by one item, must act fussy!! hahaha!
Yeah, look thru the contract properly and ask them how long they take to finish or rather tell them when u want the reno to be done! And ask if there're anymore other costs u should take note.
Say if he doesn't state here, then u'll take it the final price as per wat his contract states loh...