I’m considering writing, either jointly or solely, an eBook to help generate leads for RE clients — I’m a licensed CA broker. 

If done properly, short-term rentals can offset directly against ordinary (W2, active) income without the real estate professional status.Losses generated by increasing depreciation with a cost segregation study, can be used to offset active business income without qualifying as a real estate professional.

The result is the max mortgage payment, with 20% DP (not higher), you can make and still generate the needed cash flow in that micro-market.Don't make the mistake of increasing the DP to get the needed CF. 

I would like to pull some of the equity, give him some money, make some updates and start generating some income maybe with Airbnb or rental.

@Logan Loughmiller Both realtors and inspectors are looking to build their business through referrals and repeat customers.

- What is the customer avatar (for a lack of better words) of a MFH tenant? 

Interest generated is a sign that you did a whole lot very well.  

Spaces for corporation’s visitorsDesign and place flyers at local establishments like laundry mats, hair salons, nail salons, where we know there’s a lot of foot traffic Purchase ads and place in local news papersPost a listing to craigslist, zillow, realtor.com, apartments.com, rentals.com and other websites Hotpads.com or cozy.co → multiple rental listing platformsPartner w RE agent and advertise on MLSCreate a FB ad to target tenants Create a FB pg for rental business, post weekly content to generate following, and post listingsPay close attention to what is nearby and cater to that audience- colleges, military bases, etc.Provide stellar customer service.

Sending letters can actually put you, your customers, and sellers at risk.

If the goal is to generate monthly cash, sale makes sense.