Responses
this one is kinda like that:
http://www.mangago.me/read-manga/koi_wa_keiyaku_no_atode/
this list might help:
https://www.mangaupdates.com/series.html?category=Debt-Motivated%2BProstitution%2509&genre=Yaoi&perpage=50
http://www.mangago.me/read-manga/suteki_na_kigawa_ga_nakuttemo/
http://www.mangago.me/read-manga/mae_yori_mo_dare_yori_mo/ chapter 1
http://www.mangago.me/read-manga/suki_ni_naccha_ikenai_hito/ chapter 1+1.5
http://www.mangago.me/read-manga/kuchuu_teien/
http://www.mangago.me/read-manga/kowarekake_no_omocha/ kinda
Is there any yaoi about the uke sells himself because of finance problems in his family and the seme is rich and buys him then later on they started to date