Your description implies you are looking at one unit in that example. 

Usually, you'll have to send a certified notice to the tenant before you can file.

How much do usually budget to spend for rehab?

Owners who use lease  to options to sell  usually see buyer as kind of Flaky. 

Flat fee brokers will save money, but may not get the top price, since service is usually pretty lacking. 

If you've got a luxury STR (say, ski-in ski-out cabin in Vail or beachfront villa in Barbados) I think you have the most to worry about - it's expensive to travel there (usually by plane), expensive activities (like skiing), just all-around expensive.  

When the weather is nice, usually spring and summer.  

They don't give the phone number but if you Google the person and hunt around you can usually come up with a number.   

NNN leases are usually commercial properties that have 20-25 year guaranteed leases, that the tenant (franchise) pays for everything except you buying the building. 

If I use my normal title company they will check for liens, verify taxes, etc as per usual before closing, correct?