It's good everyone is friends, but don't just accept the scraps of what Terry decides you can have. It's ok for him to be in his parents house baring little expense. I hope you expect him to put his hand in his pocket. Moving and renting can initially cost a BOMB, even if you do it cheap.
You need a decent bed, cutlery (IKEA is good for that, and CHEAP!), what about kitchen stuff, sharp knives, pots and pans. Dining table....
Stinky mattress in the shed? Pffft. TBH, I'd be offended.