The most pressing, and i cant seem to find a true answer from the the building department OR the utility companies is if I need to have separate meters (Electrical, gas, water) for my ADU and main home. 

However, one recent sale in the area was 109K for a .15 acre lot, however, it was verified developable and had gas, electric, and water at the street.

Insulate, add electrical, mini-split ac, and possibly plumbing, as desired, drywall, tape and paint, put built-in cab's on one side if you want, hang the tv, speakers, etc, install bi-fold/multi-fold doors on the side leading to a patio, and replace the garage door with an insulated one keeping the track and removing the motor, or install a carriage type garage door into the existing garage opening.

AC, electricity, no plumbing.

During this time, inspect any agreed repairs, inspect all appliances, check whether all doors and windows are secured, working properly, or to your satisfaction, belongings of the seller are completely removed, check for signs of mold, check electricity and outlets, and inspect the exterior & backyard.

4 individual water and electric meters.The point about individual townhomes and sprinklers.

It is required to have a building permit/inspection and hire licensed professionals for Electrical, Mechanical, Plumbing, and structural engineering for load bearing, gas line work, and septic systems. 

Note: the $1423 amount includes owner paying for electric, gas & water.

Any other possitive factors  - stable tenant base  - alarm systems  - regular checks on the property  - no pets  - Lead safe certification  - newer roof, plumbing, electric, etc..Anything to balance off the lossesBe prepared that it may end up in a non-standard (surplus lines) market for a couple of years.If you did not have flood coverage before, see if they will continue the current policy if you get Flood coverage and increase the property coverage deductible. 

Then I know it has got to have rodents and bugs in the property that will need taken care of ASAP once the place is cleared out.