Create an open concept, make it a 4/3 with a master suite, completely update interior and exterior.

Refinished the hardwood floors upstairs and downstairs, installed groutable vinyl tile in first floor kitchen and shared hallway, new cabinets, faucet, sink, and stove in first floor kitchen, repainted entire interior, reinforced upstairs porch, replaced some support joists for upstairs porch, painted both porch floors, built new upstairs porch railing, installed new vanity, medicine cabinet, and toilet in first floor bathroom.

Don’t move a home unless it only needs interior updating.

I appreciate any/all advice.Current PositionPrimary Residence (Southern CA)- Between $100-150k equity - Sept will be one year owned, will re-appraise since we've improved the land, some of the interior and there's been fairly substantial appreciation in the one year)2 SFH Listed for Sale (MD and Northern VA) - Anticipate net profit $110-140k range (not bad for having only owned for 5 and 6 years and living in it for 1 year each)- Combined Total Sales Price - $850-880k- I expect to close mid-late Sept on NOVA property and no later than mid-Oct for MD property1 SFH in Northern MI - Has ~$30k equity - no plans to sell, may tap equity in near future for rehab and a cash out refi to invest elsewhereHere are the options I'm looking at:1) Use the profits to pay off some "bad" debt (some of the debt was for a $80k landscaping project on our 1/2 acre bare yard primary residence and the other was to do some rehab to our MD home to make market ready for quick sell so not bad, per se). 

That's where an experienced realtor can help.The comparable properties need to be as close to identical as possible in style (don't comp a bungalow with a colonial) and the number of beds, baths, square feet of living area and lot size, garage and basement specs, septic vs town sewer, year built and condition.A few things I use to look for regarding condition if I can't visit the property - updated kitchen and baths (granite/stainless, cabinets, backsplashes, lighting), landscaping (manicured vs overgrown) and the appearance of the interior rooms. 

Leave the existing front door as a common front door so upstairs tenant could use existing interior staircase and figure a way out to put a separate front door for lower unit inside the entryway somewhere? 

Completely upgraded the interior with emphasis on the kitchen, flooring and bathrooms.

Crawl spaces can absolutely be a huge source for mold and interior moisture...typically Penicillum and Aspergillus molds.

The description of the unit will tell you what you need to insured (could include Sheetrock, fixtures, internal wiring/plumbing, etc.)3.

Internal rate of returnLet's start with #2 - CCR or CoC or cash on cash return.