They are also a convenient way to prove I am intelligent enough to learn new things like medical device regulations or commercial real estate sales practices. 

First off, he has been a paying tenant for a number of years.... in the many stories I have read on BP, it seems there is plenty of cost every time you turn over a property, so if this tenant has been in place for so many years, you will have turnover costs anyway, but you have saved a ton not having them for all these years, so for the folks tearing your business practice apart, I'd say it has worked out thus far.In regard to what to do...

We have practically everything in house between an investment division, subcontractors ready to work, hard money lending, project management, and property management.

The first is how to identify a market and the second is a more practical guide to getting started once you find the market. https://www.biggerpockets.com/blogs/10145/66160-ho...https://www.biggerpockets.com/blogs/10145/74387-ke...

Takes lots of time, practice and networking to find great subs, learn your cost, and figure out ARVs.

Learning & practicing the math is critical for finding a profitable deal.

The days of "hard sales" practices have been over for a long time.

Money is "earned" when it is applied to the charges.I don't know the law in every state but I network with thousands of property managers around the country and this is pretty common practice and backed by the courts.As for pot, you have every right to ban smoking inside the unit.

I have had my license for a little over a year now, but due to a new baby I have not practiced much real estate.

For meeting potential new buyers, coffee shops is common practice.