Hey RobertYou've got a lot going on.Here are the issues I see you may encounter.If you encumber yourself with additional debt meaning the two DSCR loans, you will negatively affect your debt ratio for the permanent part of the construction to perm loan you are in the middle of. 

We have had soooo many issues like this of late. 200 million in projects this year alone and only one of the contractors did we have to "cut loose" on a permanant basis.

Who knows you might like the experience so much you might go into Real Estate development as a permanent career change!

The double wide has a permanent foundation and the two singles are rented for ~ $1k per month.

There are many lenders out there that offer permanent financing for properties.

Typically these blow past the option expiration and turn into permanent rentals.Get educated on how to take the option fee AND write the option contract to help (but not gurrantee) the lending bank to accept the option fee as part of the down.   

@Joe Splitrock, she and her kids out over 150 holes in the walls and all of the doors and flooded a toilet and broke two crisper drawers in the fridge, and had a dog that peed on all of the floors, and lost all of the keys, and drew permanent marker on all of the walls and doors.

***Are the walls permanent? 

Or are you looking to relocate there permanently?

No matter if you have 3 months or 3 years in real estate, learning is permanent.