Basically, "wholesaling" is no longer permitted. 

Since you can’t do a formal inspection, a detailed contractor walk-through and phased renovation estimate are key.Have you considered checking city records for past permits to uncover any unaddressed issues?

Trouble with cities on permits?

I think they're probably a decent PM but sympathize now (that I have experience) it's genuinely difficult to find high-quality and consistent cleaning, as well as steady workers that don't come and go, here in the Colorado mountains.

However, I will always contact the owner as soon as time permits.

I will for sure get the ADU permitted.

Licensed with permits ~$4,000.Full replacement of all water supply lines and shutoffs from the interior water meter with PEX and an open basement.  1 kitchen 1 bath 1 laundry. 

Call their sec 8 case worker and tell them they're gonna be evicted.

While this is municipality dependent, if the contractor is not licensed you likely cannot obtain the necessary permits and approvals.

Duplex have different zoning that may permit additional units.