This is a complete remodel with updated windows and mechanicals within the last 5 years. 

Any recent building/electrical/mechanical/plumbing permits pulled at city?

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How is the mechanicals?

They do not have to go to court to obtain a judgement if they are filing a mechanics lien which is what it sounds like you are describing.

If you have a non-paying tenant and have to evict, or any minor mechanical issue that requires a plumber or an electrician, or a capex issue like a driveway, sewer line, roof, windows, doors, siding, appliances, etc... you're in the hole big time on this property.

Newer roof, good siding, and newer mechanicals.

Neighboring houses on the same street had completely different layouts, different mechanical systems, and differing degrees of functional obsolescence.

Ours was weak and unprofessional, lacking essential elements such as an arbitration clause, dispute resolution mechanisms, and clearly defined communication methods.

I was in the Army two days after high school graduation to deal with the fall of Yugoslavia, then became a postal carrier, a baker in a doughnut shop, a coffee distributor, a motorcycle mechanic, and the list goes on.