They currently own rental properties in the UK and as both have full-time jobs, our collaborative LLC is my 'baby'.

Defiantly going to prioritize getting my contacts up.

You're certainly in a very good financial position to start shopping for a multifamily and obviously are prioritizing your real estate education.

I would prioritize based on bad tenants followed by bad units.

If you are going to have them manage your 70 unit, and there is a 150 unit 2 miles down the road, don't expect things to get taken care of right away because more than likely they will prioritize the larger complex when it comes to things like repairs, emergencies etc.

Ultimately though, a good business is one that prioritizes itself financially.

They are telling you they are bad with money and prioritize other things besides paying you back.  

Have you checked with MassSave to see if they will do an energy assessment which would include a prioritized list of things you can do?

We're not competing against one another, but collaborating. 

I would prioritize finding an accountant who specializes in real estate taxation over one that is local.There are 20+ accountants on this message board who specialize in real estate taxation.