There are many graphic installers out there that do this for a living.. Many people install their own decals. Many videos on you tube to install vinyl graphics, of any size. I started with large graphics from the git go. I use up scraps from the larger to make smaller decals, just so that it doesn't go to waste. Those decals are just my time.. I don't apply anything, I work from my home. I am probably quite a bit older than you are, I worked at a factory for 30 years and it closed. So I reinvented myself, and have been doing this for 12 years.