How to maximize triplex return (will pay for consultation)

[Cathy Bui]

I have a triplex in West Sacramento. Class D+, C- ish.

2bd 1ba, 2bd 1ba, Studio

1,580 sq ft building. 10,302 sq ft Lot.

All units empty. Appliances, carpet, and all other traits are old. 

I would like to find out how to maximize this investment. Add an ADU? Rent it all out with minimal repairs? Renovate then rent out? Do section 8 for all 3 units? Cash out refinance and buy another property vs keep low interest mortgage?

I am willing to pay for consultation if you have experience with transforming rental units.