They are either a combination of a Maintenance/Tenant Management business or Accounting/Real Estate sales/Tenant management service. 

Let me know if I can be of service.  

And yes I would recommend my services :) Hey @Donald Hatter!

Quote from @Jeffrey Hill: There are a couple of challenges with financing the difference. 1) The current servicer has to approve it. 2) Finding a lender to do a 2nd mortgage at 100% CLTV is almost impossible.

There are companies such as Cover that offers a full service ADU deliverable from design through construction completion.

You need to send him a letter with proof of delivery required (a cheap date with US postal service) and you can also post the Notice in a sealed white envelope marked confidential to his door - and take a photo of it for proof of delivery. 

I was asking if a warranty deed MUST to be prepare by a lawyer or title company, if not, I will try to do it my self.Its amazing the prices that most lawyers charge for forms/services, that 90% of the time paralegals are the ones doing and setting up.

You can put a mortgage into a "trust: without triggering a due on sale but again contacting your bank/lender is the best route to avoid any issues.Some banks/lenders or servicing companies change guidelines and even a trust may require other paperwork but the attorney usually facilitates that to be safe.  

Basically/Hopefully that is watching rents hit your bank, and occasionally calling a repair service as needed. 

Also, our virtual assistant service and their activities and processes we've perfected over the years creates a pretty massive pipeline of incoming deals.