Ultimately, everything unfolded according to plan, reaffirming the importance of perseverance and foresight in navigating complex real estate transactions.Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Quote from @Dan Lucchesi:To clarify, when you say, "so is being a Real Estate Professional," I assume you are referring to the IRS recognition of qualifying real estate professional, rather than to the the public's widely understood meaning of the phrase, correct? 

PM me and I can email you a laundry list of exactly what we lenders require when doing a bridge loan for a real estate investor.

When adding LVP make sure to have the temp up to at least 65 Degrees Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

I bought after reno but added brand new 5 Ton AC unit, dual sets of washer and dryers.Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Most generally, Form 1040NR (Non-Resident Tax Return) is filed with the IRS.

Ensure you look professional to the public.

Under contract with a public builder and ran into a delay (due to close last November) when the city administration completely turned over and changed course at the exact time we submitted our DA. 

What construction lenders have others used for prefab or modular projects?

A few of my private lender buddies recommended these, and they have some for wholesale as well.