Call a couple places up and ask them what their square foot charge is to have whatever stone counter installed.  

Property management typically charges 10% of the monthly rent. 

My husband an I decided to do a spec home starting this year, and I am in charge of the business and paper work.Can someone advise me what would be better a NV or Delaware LLC?

Not everyone reads all the words in your ad and they make decisions based on photos/price so you may be doing yourself a disservice for charging a higher than expected rent for the type of home you are offering and see fewer applicants.  

To me this feels like purchasing a car from someone, then the DMV all of a sudden says "Sorry, we were under charging the previous two owners the incorrect registration fees for the last few years, you now owe us thousands of dollars."

But, if everyone is being nice about it, I say give it back and start over but be sure to do a walkthrough because you don't want to hear in a year "guy 1 did that, you need to charge him".

If it is a home, tenants are usually in charge of maintaining the yard.

From my experience with HML anyone that charges an upfront processing fee or origination fee is most likely a scam.

., but anyone else feel free to jump in...when a long distance investor is paying a local PM to manage a STR in the Smokies, are the costs of listing/booking fees on AirBNB/VRBO/etc included in the percent the PM is charging?

Literally contractors hear people talk like that all the time and 90% of the time they're blowing smoke to try and justify that they should be charged less than a "normal customer".