See previous thread here about my quandry of charging him rent or not.
Further to several posters recommendations, we drew up a list of ground rules which we emailed to him last week to mull over before moving in over Easter weekend. He rang and said they seemed fine.
Just got off the phone to my Mum who said "I think he is a little bit worried about getting in your/your DP's way" which is news to me. Then I had the phone slammed down on me when I said in reply "well if he has concerns he needs to talk to me about them, because DP and I are looking forward to having him stay and it's not healthy to bottle up issues". She said as she hung up "do not put words in my mouth, I'm going now, BYE". 
My list of 'rules' is below. Were DP and I BU with these requests?
- Pay rent on pay day via online banking
- Your rent includes (list of bills) plus free use of washing machine, kitchen etc
- If bills increase significantly (e.g. electric) after you move in we may revise rent
- Should you stay with us longer than 3 months we may revise rent
- Park your car considerately in our street (we have nightmare neighbours who are like 24/7 parking wardens)
- Be considerate with music/TV as DP and I get up at 6.30am
- Help with housework - clean bathroom once a fortnight and keep your own room/laundry clean
- Ask us first if you want guests over
- Don't take out credit against our address
10. Turn off electrical kit if not at home (a big issue for my techi brother)
11. If you cause any damage you will need to pay to repair it
12. Keep your stuff in your room
13. This is a temporary fix (up to 3 months), not long term - please factor this into your plans for savings