@Anade Davis Agency: either FNMA, FHLMC, FHA, or VA.Look for land contracts, where seller provides financing.

This is prime real estate, and is just about the last piece of land in this area.I have begun to develop a commercial property that I own with contractor garages, which is the extent of my experience in this space.I'm trying to get a sense of how to structure something like this, with using LP's, and also partnering with a builder, and carving something out in that regard.Does anyone have recommendations on who is currently working in this space and could provide some insight?

From my research you cannot sell the mobile home without it being paid off since the land is financed with the home.

The out of the box strategies and set ups sold will never replace customized AP/Tax strategies based on individualized circumstances. 

Land priced right, zoned correctly, market analysis great and potential competition low.  

My wife and I have obtained three traditional loans and one lease with the option to purchase, resulting in most banks turning us down based on debt to income (non-portfolio lenders). 

Id like to understand what the most profitable way to fix up a current 1,700 SFR in a 6,200 sq. foot lot would be? The lot goes from street to street. Plan would be to sell. 
1. Keep existing building ($850K appraisa...

I think build to rent is a great option if you can get cheap enough land to make it worth it.

Then you'll need to find land, acquire it, find a spec home buyer and set up meetings to design plans or buy a set online with mods.

Unless the land is super valuable, probably not collateral for the mobile homes.