You have a 203k loan with the existing bank correct? 

The typical policy will cover the existing structure at Actual Cash Value (ACV = Replacement cost - depreciation) plus the cost of the renovation at Replacment cost. 

Are you trying to purchase and assume the existing financing? 

Sewer problems almost always exist to some extent on old buildings.

In either case, you should verify that you are eligible to transfer the funds from your existing retirement account (e.g. if the funds are in your current employer 401k, you will likely not be able to transfer until you quit your job). 

I would not get flood insurance.The type of loan I would be using is LMA which would be leverage/lending against existing stock portfolio investments.

They are relatively inexpensive compared to gas fired heaters and they can be added to each unit’s existing electric panel.

In either case, you should verify that you are eligible to transfer the funds from your existing retirement account (e.g. if the funds are in your current employer 401k, you will likely not be able to transfer until you quit your job). 

If you feel you have exhausted your existing options, consider these six networking channels.Networking MeetingsMost towns have networking opportunities for individuals and small businesses.

I can tell you they still exist.