For instance, said property manager manages maintenance issues, problems that arise during bookings, basically anything that needs a physical person at the property, while I manage the rest?

I expect there will be many more issues with these transactions moving forward. 

What can I expect for timeline, potential issues, rough costs? 

I think the engineering issues on them have been resolved.I've used a number of different brands (lower price point) and haven't had issues with any of them.

The buyers did a long inspection, multiple days... made a huge request for concessions based on what we knew to be purely made-up issues.

As Stuart mentioned, there are several issues that might arise with the property, which could definitely impact your cash flow. 

People who have service dogs (or horses, as these are the only 2 service animals) that are genuine have no issue disclosing that on the front end and can answer the 2 questions easily - is the animal necessary for a disability, and what specific tasks has the dog (or horse, if you're getting one of those) been trained to perform? 

@Rud SevHere is a start:https://www.biggerpockets.com/forums/51/topics/839015-are-sy...https://www.biggerpockets.com/forums/51-tax-legal-issues-con...

A lot of maintenance issues are repeated again and again on all the properties a PMC manages.So, a PMC has pretty good idea of what many issues cost.

Quote from @Jason Burkart: Quote from @Linda Weygant: A few issues come into play on this.1.