These days I bet because no one builds them they probably cost more than a traditional. 

@Jay Shah I'd recommend running the deals based upon what you could rent the house for currently as a traditional rental, if your plan is not to live in the house for more than a year or two.  

I am fairly certain no longer needs funding, but for any others that stumble across this post since it has been resurfaced, you need to know that Unsecured Borrowing is not allowed by any traditional loan options (fannie, freddie, USDA, FHA, VA). 

This method provides several advantages against a traditional manager as I can cater my service and fees to the individual needs of my owners. 

If you finance the purchase of the land through a traditional source bank/credit union most will require at least 20% down.

Hello, I've read up on the using the Heloc to finance rather than the traditional mortgage.

@Sam Liu you might consider Reverse 1031 Exchange to avoid some of the challenges you mentioned you faced with timing and traditional 1031 exchange. 

Traditionally, I've adhered to the 20% or higher down payment rule to secure better mortgage terms and avoid Private Mortgage Insurance (PMI).

meaning, do you want to be a traditional real estate business representing retail buyers/sellers?

I see this as a chance to do some good and make better money than if I were to go the traditional route.