If so, what is the process or worse, what if the other lienholder refuse to sell? 

Can you have better interior design?

I'm really interested in in the Furnished Finders MTR for traveling professionals however, I'm hung up on the contracts and payment collection process. 

There are several skip tracing companies, but keep in mind LLCs are a double skip process, first the company to find managers/owners and then skip tracking that company.

You have an extremely busy life already with kids and the W2 so you want to leverage their resources to speed up the process.

Please contact me so that we can talk about the process.

Chief of these is that you use a the services of a qualified intermediary to guide you through the process.  

Should line up very well with your needs - designed primarily for people like you, no W2 income but liquid assets and eyes on cash flowing rental propertieshttps://www.biggerpockets.com/blog/dscr-loans-what-are-they

60k is a bit less than you need in tampa. lots are 75k for infill ground up multifamily which is the realistic only way to be in the urban core is to build and design what you want.

When approaching seller financing, make sure you can explain the process in clear detail first.