Need refi , rehab, with sweat equity if possible

[Tim Wilkinson]

Hey all. Trying to figure out how to help my old man out. Here is his situation. 

He lives in SC, but owns an investment property in FL. This mortgage would be for the investment property. 

He is 69 years old (maybe that's useful)

Credit 700-750

The house payoff is $55,000

The value currently is about $70,000.

Looking to put $30,000 in rehab cost
ARV estimated at $120,000

He wants me to manage the project as owner/builder with POA. I can self-perform more than half the rehab. I can't do it for free. I would be going to FL from MA and househacking the remodel if possible.

FNMA Homestyle reno loans do not compensate for sweat equity, but they do offer refi/rehab for investments. 

Are there other options I may be missing?

Thanks in advance!