One thing you might think of doing is having and promoting your own website to avoid the exhorbitant fees charged by the third party sites such as Expedia, Booking.com and Air BnB.  

It could save you thousands of dollars of expense and time in the long run avoiding testing every two years.

I use a point system for screening; applicants get positive points for positive aspects, lose points for negative aspects, and I have a point threshold for each property. 

Forget trying to walk them through a simple repair over the phone, to avoid sending a ServiceTech and saving an owner money.

But I'd like to see Lynnette's projects to support your claim "the portfolio was a 30% increase in cost to the consumers" since in TN, NC, VA, NC PPAs are priced at avoided costs. 

Most of the technical aspects have already been covered.

@Edgar Duarte Selling now under the primary residence exclusion avoids capital gains taxes, allowing you to reinvest the $500K equity in diversified assets like index funds or additional rental properties.

The one aspect I'd say where planning can really provide benefit however is with tax planning.  

SO lot's of language on this aspect.

6 Mistakes Every Co-Living Investor Makes& How to Avoid Them1.