I am in a highly concentrated beach vacation market and still have 80% first page search impression.  

When you have studied your market properly you should be able to provide the answer of if single family or residential multifamily is better for cash flow. 1% rule was for a time when almost all deals were decent as a way to rule out the lessor deals and concentrate on the best deals.

In terms of my goals, I concentrate/focus on three metrics (and cash flow isn't one of them because that can be manipulated). 

Better to concentrate on decreasing expenses and saving for now. 

Rather than concentrate on the initial cash flow, concentrate your effort on markets that have indicators of strong rent growth.  

With a 4-unit building, that’s a very high customer concentration.

Concentrate on increasing your earnings rather than on not paying off your debts.

*That said* - I agree with @John Underwood as you should be concentrating on saving and owning investments, not attempting to create a middleman job.

It is a private hedge fund that invests in real estate, they just have a terrible process.I know there is lots of talk out there about how to tell scammers from real outfits.The scammer will concentrate on how to bilk money out of youThe Real Loan officer will concentrate on how to get the file in order for UW and get it closed. 

I suggest having smart TVs and let them log into their own accounts, preferably with a guest mode so they auto-log out after a certain number of days.For catering to families, I would concentrate on providing amenities like puzzles and games.