Chances are, if you are getting "residential IPs" then you will be working with hackers and dealing with illegal computer access. The only people who could provide these are individuals (routing your traffic through their PC which would be very foolish to participate in) or botnet masters that have infected other peoples PCs. Most VPN/proxy providers use commercial IP blocks as you probably know already.
this, this
and when you will get your "residential IPs" this way, you could be charged for any crime that is assigned to your name and this IP
because hacker give you some IP and then he uses it in crimes, then police finding you first
Risky stuff, i would go for commercial IP blocks like Fortify said.