I can't imagine a "barn size" outbuilding without at least a light (and maybe an outlet). 

Well, after SEVERAL back and forth attempts to get it right (due to the language barrier), we’ve finally gotten a logo completed, but the package I purchased also came with a social media kit (along with 3-d logo, logo transparency, stationary designs, and source file). 

House hacking is the way to go if you're starting out. Let

According to the building code a bedroom needs to have a minimum size, min. ceiling height, ,means of egress, a light, and minimum outlets.

And it is also an outlet at the time to just vent if I want to.

I was thinking maybe through social media?

Whether it'd be direct mailing, cold calling, door knocking, social media, or word of mouth.  

Social media, technology you can reach people anywhere instantly use it to your advantage don't take it for granted.

My units are very small - under 600 square feet each - so not as many outlets, etc.

I looked multiple times and couldn’t find anything, but I just spent 10 more min looking everywhere I could via social media and found one!