Doing so, i will make close breakeven with my current mortgage.

Additionally, be sure to have a solid business plan in place to present to potential lenders.2) In addition to a construction loan, you could also explore other financing options such as traditional mortgages, lines of credit, or even private investors.

This is a great question and one that unfortunately most people don't teach/educate on so there's very little information out there on how to become a developer and how to obtain the proper tools, resources, and team to execute your plan. 

I sold a partial on a mortgage note I own. 

Check into Wister a sister company to Proper that understands STR and PM of them.

Seller financing wasn't on the table, but I looked up the mortgage information and it was free and clear.

I live in Oak Cliff and do a lot of business in Dallas proper.

It is more challenging to get mortgages on properties that are of lower values, which is why I am suggesting local smaller banks, who have a mandate to serve the local communities. 

I also have a mortgage balance on a rental at 4.5% I got back in 2015.

Has anyone used filo mortgage?