You are correct; it would be awkward having two different parties staying on the property. 

Make no mistake it isn’t quick or especially comfortable but it can definitely be profitable.As for the rent a room thing in most locales I have to wonder if the additional rent is worth the hassles of dealing with the increased time and liability of multiple tenants in one property but that’s a totally different conversation. 

They all seem to have the same view which differs from mine.

However, they approach financial health from different angles.The 50% Rule is a quick estimate that suggests operating expenses (excluding mortgage principal and interest) will roughly equal 50% of the property's gross income.The DSCR is a more precise calculation (Net Operating Income / Total Debt Service) that determines if a property generates enough income to cover its debt obligations.Deal example:- Class C middle class neighborhood- 4bd / 2ba single family house- ARV: 190k- Purchase: 105k- Rehab: 35k- Market rent: $1,400-1,525- Section 8: $1,475- Property manager: 10%- Taxes: 125 month- Insurance $1250 yr- HOA: $55 month- purchased and rehabbed with all cash.

If millenial homeowners can't even change their home's air filters, or snake a toilet, or change the oil in their car, that's guaranteed future business for HVAC companies, plumbers, mechanics, and those places all need a place to conduct business in.The commercial mortgage pricing software I use has somewhere around 50 different asset classes in it.

What's the difference between co living and shared housing?

First red flag is if they say that they will shop your deal with a few different investors.  

I’ve owned different residential homes in California, both sold off market and for over asking.

I can see what Nathan means, but I see it differently.

This Wikipedia page gives different wall types and how well they block sound.