That is correct, no maid service, unless you are there more than 7 days straight.
I am an owner who has rented from another member and I am presently renting points to a non-owner, so I can see the concerns on both sides of the transaction. I can tell you that I feel it important to get as much information from the person you are renting from as possible, how they expect payment, will they provide you with a phone number to get in touch with them, etc. For your own piece of mind you may wish to have a contract of the transaction.
Let me also warn you that once you stay in a DVC Resort, it will be very, very hard to go back to a regular hotel room.