This could mean investing in property flips or purchasing out-of-state rentals for more stable income, but it would require letting go of the $1,350 rental income from the manufactured home.What factors should I consider for each option, and how would an experienced investor assess this situation mathematically?

Quote from @Nicole Koch: I think that most people looking for anonymity are basically trying to keep their name off public records so that if they own rental units some psycho cant just look up who owns the property, whats their FB, who is the wife/husband, kids etc.. 

Go into the new member introductions forum and watch for the same few people who say the same basic message every time someone new comes on the site.

It's basically set up for MTR and much less hassle, but less vetting, and way lower cost.

Also, have you made any significant alterations to the property or if it were put on the market today, would it be indistinguishable from a standard 4-bedoom house (are there any extra walls for the SRO, constructed locks/barriers etc.)If its a standard SFR and the leases are very short term - there is a path that you could refinance this with a DSCR as basically a Short Term Rental and then potentially change strategic course back to SRO if needed at a later date

Qualifying as a Real Estate Professional (REPS) is assessed annually.

I wrote a long post about the basics of depreciation if you want to understand it better:https://www.biggerpockets.com/forums/51/topics/1121063-expla...2.

As soon as I read "hired a property management company to handle the day-to-day" it was clear to me and anyone else with a basic understanding of the rules that he was likely SOL.

They may ask for a basic LOE but that's if they are really nit picky. 

LTRs basically do not cash flow at current prices with conventional rates.