I married very young and from day one all our money was joint. We both had access to it all and financial decisions were discussed and agreed. In reality, I managed it, and he'd ask me what we could afford or I'd tell him to rein in the regular coffees if things were tight. I'm not sure I'd have been as comfortable with it the other way around.
If he were to move in here it would very much be my house still. Neither of us would want or expect that to change. He's not in a position to buy something, even between us. This is a reason why we haven't lived together before.
So the house is mine. Does he pay "rent" ,maybe equivalent to a room in a shared house locally, or is more he pays his share (half?) of the bills?
I'm also concerned that with the house being mine, all the responsibility for taking care of it falls to me. Financially that's probably as it should be, but in terms of labour, I imagine it will grate?
How do others set things up?