This thread is basically the exact conversation my husband and I have had whilst watching this terrible/fascinating programme.
I wouldn't object so much if she stopped describing it all as "completely free" - when you factor in fuel and van hire, fittings and trimmings, labour, and the fact that we don't all have friends giving away caravan/massive velvet sofas (PEARL LOWE), you may as well just buy new stuff you actually like!
Disclaimer: I actually do a lot of "upcycling" (ugh) and practically everything in my house is second-hand, but Kirsty is making me cross.