@MrGoose I think normally it is the case that the woman be married into the man's family in Asian countries (China, Japan, etc.), so in this case he's implying she can get the man to be married into her family instead.
42k yen for a room of that size with bathroom and toilet + kitchen is quite cheap. I have to pay the same for a room around 10 tatami with 0 extra, only a fucking bed.