What's your equity position?

With Google, Yelp, Facebook reviews as well as what is on their site and what type of content they are posting on their social media pages....

This contractor has 0 reviews on yelp which I found a bit sketchy, but was able to vet him by his contractor's license, worker's comp, and by visiting some of his ongoing projects.

In many cases, whatever weakness got them in that position (lack of focus, lack of drive, failure to take responsibility for their destiny, etc.) will also make it difficult for them to succeed in real estate. 

If.a general inspector sees something of concern they will then recommend a structural engineer review the property. 

We pride ourselves in keeping the forums positive, helpful, and focused on real estate (please, no politics, religion, etc.).

I concur with @Patricia SteinerIt's essential to review your lease to check for any clauses related to pest control.

Mostly people with minimal RE experience are adding a single ADU and they often make that choice based on cash flow without taking into account the negative equity position.  

Confirm with the solar company if the loan is transferable and review terms carefully—it’s a potential hurdle with lenders or resale.A DSCR (Debt Service Coverage Ratio) loan might be an option since you’re focused on rental income.

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.