I understand your excitement. Haven't been in the sign world long enough to not remember the thrill of the sample kit
But - and I say this as no slam, but as advice from someone who has been there, done that - hanging signs out in the world is not the same as slapping vinyl on something. I loved my Gemini kit - but we did NOT install any sign letters. We just didn't feel qualified... and in reality the customer I dealt with in TN wanted to do it themselves to save a buck. Although providing the sign to them to hang themselves is something we would have done.
The reason we didn't install onto their buildings, walls, etc. was 2-fold. First and foremost was insurance. I know you work from home (I did too at one point), so I'm guessing you probably don't have any insurance to cover things like damage to buildings, the sign falling on someone's head... you know the things that will cause someone to sue you and take everything you own. That scared the heck out of me. I live by the "Just because you can, doesn't mean you should." rule.
Secondly we made the decision (and it was probably a bad one) that we wanted to do only those things that we either A) Already knew how to do very well or B) Wouldn't hurt anyone if we screwed up. I was willing to take a chance I might have to pay for a paint job, but I wasn't willing to take on the liability of building repair or physical damage by my shop's actions (installing an outdoor sign on a building).
That doesn't mean we didn't learn on the fly. Post and Panel ? No problem... Install that same sign on the side of your building - we weren't interested. That kind of learning has too high of a price tag.