Tried posting it here but got in trouble for self promoting.  

As far as exterior, either redo all the siding or just the pieces that need to be redone.

I always steer clear of Angie's List, Yelp, BP Vendor, Dave Ramsey Select Vendors, or any other service that charges the vendor for membership and then promotes the list to the public as if trust, excellence, and performance have ANYTHING to do with the list selection. 

There are a lot of moving pieces when getting into Property Management, do not underestimate the amount of effort or work involved. 

Nowhere is wholesaling the attractive “lifestyle” promoted by people with something to sell you.  

Some brands are better than others for having the nose pieces for the front of the stairs.

There are already means to sell pieces of individual properties (simpler than options like condo conversions).  

To answer your questions: The seller financing piece is likely to complicate your refinance.

Two new posters here and the first thing you trying to do is to promote your $39 a month software?

One piece of advice I want to share is get a copy of the tenant lease!