That's too bad you all are sending each other mixed messages; that you do not want to move in with him or give him a key to your place but your apartment is too expensive for you and you want something else (somewhere, just not with him).

Did you offer to let him pay for his gate key? Can you find a coin laundry in town that is cheaper?

If you do not want to move in with him now/yet/ever, there's nothing to feel guilty about; yes, he's going to continue to wish you would and keep trying to coax you, etc., that's a good thing; he wants to be with you! If you are sure what you want, that should be enough for you and you could tease him about his efforts to coax you. When he said he did not know what to say about the laundry machine prices going up you should have said, "Don't know what to say! You should offer to buy me my own washer and dryer!" :-)

You cannot have it both ways; where he "lets it go", something near and dear to his own heart. That would make you feel better but does not get his wishes and needs met and that's what each person is charged with doing for themselves.

Switch to feeling badly for him, that he can't have his desire (yet :-) but not guilty about it. You have your needs and are doing a good job with them it sounds like.