Or do you know of any groups or individuals working in this space?

There'll be like-minded individuals who's brains you can pick as well:https://www.biggerpockets.com/forums/521/topics/1230348-pint...

In an LLC, individually, layers of LLC’s - a WY LLC owning a PA LLC etc.

If you are looking for a true mentor you are much better off going to local meetups and making connections with individuals 1-1. 

I guess my question is, should I narrow my focus to one REI strategy or keep it broad and analyze each opportunity individually?

Would you purchase new mobile homes and place them on each individual or combined lots and either A.

Gelbart We are still using good o'l Propstream for "Individual" distressed sellers however if you know anything about propstream they are not good for searching LLC and other commercial entities. 

All utilities are split and are paid individually by the tenants.

I'd estimate that there are less than 1,000 legitimate, or "professional" wholesalers, in the United States of America, as defined by individuals who make $100K flipping contracts, and collecting assignment fees, in any form, and who have made that amount of income more than 3 years in a row.

Yes, there are exceptions for significant life events (job change), but each individual must meet the FHA loan qualifications on their own, and the second loan must be for a valid reason, like a job relocation or other extenuating circumstances.