This strategy has allowed me to save on closing costs, secure favorable financing terms, and refinance almost immediately, all while minimizing my down payment.

I am VERY certain I have made some (or many) mistakes or left money on the table or overpaid etc... but all of these deals are cash flow positive after all costs + vacancy and maintenance. 

Adam,What you are dealing with is a lender or loan officer who set up "insufficient Escrows".

As a result, in a public search, the governor name would be me.If I set up a Wyoming LLC and modify the Operating agreement to have my WA LLC to be 100% owned by my Wyoming LLC, I assume I would still have to list a natural person as the governor of the WA LLC, and my name would still show up there.

Repair & installation costs in the Boston area are some of the highest in the country.- Watch out for residential tax exemptions, and be aware of which towns / cities have them.

Settling / drainage - Gutter set up, gradient of surrounding land, how water moves during rain and subsequent cracks in/around house3.

Your $400 set up fee seems low for all you've listed. 

Do you need a course costing $1,000's which could be put into another property? 

@Noah Margate, if I get seller financing, I don't have that mortgage show up on my credit report, I can negotiate the interest rate with the seller, I do not require an appraisal, origination fees and other "junk" closing costs. 

The only benefit you'd get from a fideicomiso is asset protection so you have to decide if it's worth the cost.