I have a mix of MTRs, STRs, and a room rental and I can perform all the needed property management and bookkeeping features on the site. 

Predictions are for fools; numbers are for performers.

Your name and credit would stay with the existing note, which you would keep paying on - ideally yourself with money you receive from the "buyer", because if they don't pay your credit is wrecked and your house is in foreclosure.If you search on here you'll see everyone and their brother looking to do Subto and it's a nightmare unless the buyer has the funds to pay the note off if/when the original lender figures out you don't occupy the property any more and are attempting to do what you want to do, since most loans are going to specify that performance.  

Some packages genuinely improve property performance, while others might feel excessive.

Look up ideal existing performing properties, your "hero's" as it were, find out who own's it, and reach out to them. 

Every day I receive calls from out of state investors who paid far too much for their property in my opinion and it always is because they trusted others too much instead of performing their own research.

The only think I hear about hers is it is difficult to have work performed on it by a contractor.

Most tools give you a glimpse of past performance.

Plenty of STRs that perform just as good as the pool STRs because they have a great design, location, or other fun amenities that have less liability and headache.

Well worth it IMHO given poor performance of RTO/seller financed zillow listings.