They are classified as "personal property" as opposed to "real property." 

Now on the back end (sell side) if the property is still classified a SFR could I try to just sell it to another investor at that point for all cash?

I definitely don't want to use Craigslist or the classifieds.

Note, however, that if you are attempting to raise capital from other investors, a QOZ Fund is classified as a security, not a real estate interest - it is highly recommended to consult your CPA and attorney before raising capital from others.If you invest in a QOF fund that does not adhere to the up-front or on-going requirements, an investor potentially opens themselves up to taxes on the previously deferred capital gains/recapture and potentially to penalties. 

There is a little bit of wiggle room when buying real estate to classify in taxes what portion is land and what is structure ( structures are depreciated).

Since he's living in the house, we put our son on the deed so it was classified as owner occupied for better terms.

Just because you're building it new shouldn't change how it's classified for loan purposes. 

Mortgages that are not government loans are classified as conventional loans.Government National Mortgage Association (Ginnie Mae)A government-owned corporation within the U.S.

Worst case they take your ernest money.Our primary area I classify as a C to C+ area (We have some units in better areas but most of our units are in a working class area with most structures built from the 1950s to the 1980s). 

I suspect the percent is about the same today but I do not desire to go through 1800+ billionaires to determine which ones have significant RE holdings.I do not classify the billionaires that invented something or started a business with those that made their wealth by trading publicly traded companies that they were not an insider.