In either case I probably wouldn't add extra cash into a buy down, but using seller concessions could be a smart move.

Always smart to consult with attorney, but I really don't see any illegal acts by going into contract and then deciding to assign the contract to another entity.

Google LLC announced Aug. 15 plans to invest more than $1 billion in Texas this year, its latest strategic goal focused on supporting cloud and data center infrastructure.Some of that investment will go directly into the technology giant’s data center campuses in Red Oak and Midlothian, both south of Dallas, which are helping the company meet the increasing demand for cloud and artificial intelligence services.

I have a smart thermostat, so I will reset the temp on the app after a guest leaves, and check my smart lock app to make sure the door is locked (I have found guests forgot to lock it a few times). 

Another potential question to ask would be if they use a comprehensive property management software and if they stay up to date with technology.

We are eager and we’re smart and we work very hard. 

@David Neubauer Forming an LLC is smart for liability but can save you taxes if get an S-corp.

For the general question in your subject line "is it smart to invest in real estate" I would say yes.

Raleigh-Cary, NC, is a rapidly growing area with significant expansion in the healthcare, pharmaceutical, and technology sectors.

I wish I was smart enough to say we held on to it but no we sold it in mid June with it went up to about $9600 a coin.