My tenant has a home studio, and is worried about pictures of their equipment floating out in the web.

The zoning map and zoning descriptions can typically be found on your towns web site or by google search. 

Tpyically, the bank may publish a "we're bidding up to this amount" number.  

@Isaac Wilkins This is the best place on the web for real estate advice, paid or otherwise.

There are legal treatises published by companies like Thomson Reuters that can cost a good penny.

After reading plenty of RE books, listening to BPs podcasts, and surfing the web I am very interested in house hacking a duplex where I will live on one side and rent the other.

I don't want it to be LOCKED away like it is.I found this concerning a ROBS: (web address is https://fitsmallbusiness.com/rollover-business-sta...)

They're not photo lights, but they certainly provide lighting that gives a great shot for web pages. 

The web site you mentioned apparently only deals with Tax Lien States.I favor operating close to home, and your home state is a Tax Lien State, as well as nearby MD and WV.I'd read all that I can at low costs or no costs, websites, books etc., but I would not spend a lot of money on some course.I'd go to some local sales in areas that you would be interested in purchasing Tax Liens. 

So it would have some kind of software integration that would create a new key code and issue that code via text or email or a web page to the guest upon check in.