This doesn't necessarily mean just an investor, but somebody who active works in the space and puts in at least 700 hours of work into it per year. 

The priority is consistent recommendations from active investors. 

Everyone here wants to be active investors not passive investors.

Networking with local real estate investor groups can also help identify lenders active in your area.

Personally I wouldn't feel comfortable trying to wholesale a relatives $1M home knowing that I am breaking the law if I cross over into doing anything that can be considered representing them in the transaction, and knowing it will only be marketed to people who buy properties wholesale (typically investors who don't want to pay retail prices), instead of the majority of retail buyers active in the market who are typcially willing to pay more. 

Are you still active? 

I vet a lot of passive offerings and am particularly active in MHP, SS, and MF. 

For bookkeeping purposes, I recommend designating a separate bank account exclusive to the house hack activities to keep some sanity.

Now, if you've already set up LLCs per property, then yes, have at least 1 checking account per LLC.For people who own their properties personally, keep personal accounts that are exclusive to RE activities so all of that activity stays separate from other personal transactions.

I would also pay by activity not by the hour.