They are nationally recognized and should be able to give you guidance.EDIT - I put in a call to them and waiting for a call back so I can get you to the right person on their team for help if you decide to go that way.

Give Proper a call @Holly Polf.

propstream or some other list service filter and make a list use a list service to contact owners via cold calling, mail marketing, texting etc Once the owner is contacted, get the condition of the house, pictures and get a contract signed 

See what comes up and call a few.

In looking for a new apartment I called a place.

Some ideas would be to: Take a look at a market report for Pittsburgh and add a few percentage points to be conservative, Call around to multifamily brokers or property managers in the area and ask their vacancy rate, asks banks what their vacancy assumption is for underwriting, etc...

Generally the policy will be written with limits as follows:Existing Structure:   limit is the depreciated value of the Building (also called Actual Cash Value)Renovations:            Limit is the total cost of the renovations being put in to the structureMost Insurance companies that write these policies will want to know if there are any Structural work planned.  

And, I would send notice of non renewal to the perpetually late resident, which is a judgment call based on my experience that late payers end up as non payers in many cases. 

Conventional is just called renovation. 

also for a notice to remedy it is called a 10/15 day notice, you go and inspect in 10 days to see if they fixed the issue if not then you file for eviction on the 15th day.