Also, for an LLC. to remain valid, it has ongoing annual tasks that must be completed.  

H&R Block software prompts me: "When you stop using a property for income, if you didn't sell the item, you may be able to write off any remaining basis" which then refers me to fill out form 4797.

My related finance company made over two billion in loans from 1975 to 2014 when I sold off the remaining loans to an institution.

Money magazine had showed McAllen, Texas as the number one property in the nation for inflation, the previous year.

It's just that 3.5% is cash, 5% because you're an owner occupant, and the remaining required balance of the 25% down payment is in the form of your HLAW and sales ability. 

In most areas appreciation parallels inflation rates.

I'm not sure the best way to go, cash back refi on the land, (and use that cash and remaining cash I have to build) construction loan, bridge loan?

That is why Feds will have another interest rate hike to curb inflation.

It's true that Zillow (and the others mentioned) offer some of what you're describing, but there remains plenty of room for differentiation and specialization. 

The remaining profit from the deal would be distributed 50/50 between you and your partner.