From this question Is it sourced that Avrohom Avinu charged his guests payment if they did not make a Brachah? and from the fact that Rivka after serving Eliyezer got paid for it,
It seems that the mitzvah of accepting guest is to have room for someone who needs,
and that charging for the room and board does not diminish from the mitzvah
Does someone say this idea?
Is it wrong?