2) The unit which is a studio has a small bathroom which has a small ventilation from the building.

Maybe you change your mind and remodel the bathroom!

You don't even want to touch a door or cabinet handle, not to mention corners of the house or bathroom floor.

Filled with natural lighting, this single story home features 2 bedrooms and 1 bathroom.

I would most likely use MLS to find a property but for Padsplit I would want to add bedrooms and possibly bathrooms to maximize bedroom count. 

But you still have to provide (and maintain) a kitchen, a bathroom, HVAC (well maybe just heat), a water heater.

The comps in the area for MF's were at minimum 550k.Since purchasing the home there have been many updates to it to include a fully updated 2nd floor unit, updated bathrooms on both floors, new kitchen on the first floor, new roof, new driveway, new paver patio, updated front porch.

For instance, one property seems to have an extra bathroom that is not listed in the county records.I plan to make some modifications, including removing a closet wall to expand a bathroom and taking out a kitchen island that contains electrical outlets and a switch.

I know the typical value add on a SFH is to fix up kitchens and bathrooms, and forced appreciation with ADU’s or new bathrooms and bedrooms, but how can you do this in a MFH?

SW also does a virtual color consult which we have done a couple of times when were trying to compliment existing colors so we didn't need to repaint the entire house or troublesome unique bathroom fixtures.