Purchase price: $490,000 Cash invested: $61,000 Sale price: $649,000 Nestled in the highly sought Silver Sands neighborhood of New Smyrna Beach, this 4-bedroom, 2-bathroom home offers the ultimate coastal living experience.

Gut rehab, all new kitchens, bathrooms, all new EVERYTHING.

I also agree, the property needs a lot of work and the apartments are not laid out very well.. especially that wonky top floor bathroom :)  Thomas, also keep in mind some banks may not lend on a property with an underground oil tank..

In addition We did an addition in our primary residence with 1 bedroom and 1 bathroom and it's rented about $1700This house has still have additional 4 bedroom and 3 bathrooms.

LVP flooring the whole level , including bathrooms .

Updated the bathrooms, fresh paint and updated light fixtures.

Typicaly the amount of septic you need is going to be determined by the bathrooms in the units you are connect to them. 

I know it needs a few things (bathroom size) revised to make it code compliant, and I will need an architect to help navigate zoning (another thing we don't do in Houston :D), site plans, elevation aesthetics and local requirements. 

We’re looking to remodel our small kitchen (about 12 x 12, L-shaped), and convert the garage into 2 bedrooms (not an ADU, no added bathrooms or kitchen, just adding bedrooms to the house).  

I rent out the master bedroom, bathroom, and an independent kitchen area with its own entrance for $1,200 per month.