Aside from your public offering of unregistered securities that's risk I see immediately. 

Multiple offers are now the exception, not the norm.

We just got offered a dream job that would move us out of state.

The Seller clearly doesn't need the money immediately or he would have evicted these tenants and replaced them with renters that actually pay rent.I would offer to purchase the building at the listed sales price.

Unfortunately, the majority of investors that experience terrible service from turnkey companies, figure out that it's not worth spending tens of thousands of dollars suing their turnkey provider and just move on - which allows the turnkey provider to not change their ways and stay in business:(You should also check out this BP thread about the topic:https://www.biggerpockets.com/forums/88/topics/976647-turnkey-company-suggestion?

Or any suggestions on how to determine how a property will perform as one?

If you decide to sell and have not done it before, I might suggest using an agent.

Would appreciate recommendations from this group for attorneys / law firms that specialize in such matters as well as suggestions on what I should / could do if you have personal experience with such matters. 

Some common names you'll see thrown around a lot: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend you search for each of those apps online and see what they offer, how much they charge, etc.

Owners mistakenly ASSUME all PMCs offer the exact SAME SERVICES and PERFORM those services EXACTLY THE SAME WAY, so price is the only differentiator – so, they often select the first PMC they call or that calls them back!