It doesn’t matter if it is manipulation or not. He just put the ball in your court and explained part of the dynamics of addiction.
So now you have a choice if you will choose to be part of the problem or become part of the solution.
I am not sure I would let him in tonight, I think it will be very hard not to want to help him. Maybe pack up what he needs in the more immediate. Figure out a time and place ( not yours ) where he can get the rest. If you want to get a list of sober housing together for him that is fine, put it with his stuff, leave it outside when he comes. Also maybe be in your car as he drives up tell him good luck, if you love him it is fine to tell him that too and drive away. His tune may change you don’t want to be around for that.