@Jeremy Willis this sounds like the typical seminar funnel circuit designed to get you in at a low price and only give you enough info to get you to purchase the next level of whatever they tell you you need.

As an Interior Designer, I got a little carried away :-) By the time I had finished..

As an Interior Designer, I got a little carried away :-) By the time I had finished..

As an Interior Designer, I got a little carried away :-) By the time I had finished..

As an Interior Designer, I got a little carried away :-) By the time I had finished..

@Jared Michael Rollins my wife designed & built our principal residence as it also has offices for our respective businesses,  (we are grandfathered in for 'home business offices').

But that rule is designed to avoid someone other than the tenants parking there all the time (such as a BF or GF) not a different vehicle every few days. 

A good designer/builder can help you here. 

In our market (and I hope most) they require a lot of the property safety designs including egress from any class room, sprinkler system etc.

Sometimes through "homestead" exemptions, and other times through different specific statutes designed to keep citizens from becoming totally destitute.