This purchase exemplifies the commit and then figure it out philosophy.

I get into contract in my operating company and then assign the contract to the new LLC prior to closing.  

Then after that we split cash flow 50/50?

Whereas if you and the other investors held ownership as TICs (Tenants in common) then you could sell your portion and do a 1031 of your portion while others did something else. 

Can you then decide to list and sell the house two months later...yes.

The highest value post-TDR use, though, is to go further and create "ecological mitigation" credits and then sell those, too.

Wondering about investing and then filling the park up to get to full occupancy. 

What would be the best way to go about it then?

Then over the course of the first year or so, if you could raise the rents by a total of $1k/mo (they are currently $2k, $1k, and $1k), then you might be able to pull out about $60k-$80k in a cash out refi. 

That would be a helpful addition to your plan as you would further reduce your cost of living.Also don’t forget from that $600 you are planning on getting in cash flow you have taxes, insurance, maintenance, capex, and vacancy to consider.With two homes, you may want to keep that extra $20k as an emergency fund rather than spending it on a third property and then be left with no emergency funds.