@Peter ColeThere are other loan products out there, even some that are still residential (as opposed to a commercial-type loan). 

Your best bet is to explore hard money products upon the initial acquisition or work with a private lender and refinance via DSCR or commercial loan.

We used to see them very active on selling product but had heard they winded down thingsNot sure what name they go by today if it’s still vision or not

@Jeffrey Gomez, is a conventional loan product an option for you?

All VA, FHA and USDA loans are assumable and even a few Conventional loan products out there are assumable as well.

You compete by putting a better product out there.

The one I am used to using provides cost estimates of various rehab products based on specs about the house.

It will empower your discussion on how your project is a financial product and how it relates to the investors financial plan.

I don't think that kinda software is going to be very affordable for a small scale developer (as most rehabbers are).The engineering company I work for uses a product called Premavera.

The uniform consumer code has MANY provisions that protect consumers from unfair business practices of people engaged in the business of selling a product to consumers.Finally you need to ask an attorney in the state where the trailer park is.