What is great about Charleston from an investor prescriptive is the limited inventory of STR-able homes, which in turn drives the nightly rates up.

Prescription medicine can be purchased over the counter

If she has a prescription, then it could be a violation to evict her for it.My two cents - talk to the tenant you think is smoking weed.

What I put below is not in any way prescriptive, but maybe it will help you think critically and creatively as you take steps towards being a real estate investor. - You're a young dude.

We are attracting all sorts of companies working on "boring" tech things like medical logistics, prescription streamlining, automating insurance processing, healthcare analytics, etc.

Items go on the curb, the landlord is NOT required to store anything (except prescription medicine or prescription medical equipment which must be held 7 days from the date of discovery). 

I will request a doctor's note and/or prescription (and registration of ESA if available).

Btw, if you want to read about some GREAT ways to streamline health care and reduce costs, check out "The Innovator's Prescription," by Clayton Christensen, a Harvard professor and author of "The Innovator's Dilemma," (one of the most influential books in the technology world from the past 20 years).

There is something called an "easement by prescription." 

Grocery stores can give everyone a break on groceries, banks can give us a break on our mortgages, drug companies can give people a break on their prescriptions... will it ever come to this?