Here are a couple of tiger vinyl wall decals I created in my Pazzles software. I converted photos I found online to make the vinyl decals. I can't sell these because the photos are not mine, but this should give you an idea for vinyl wall decals you can create at home.
Normally I mail vinyl decals to people so they can add them to the walls themselves, but lately I've been getting requests for digital files so that people with die-cutters can cut and weed the decals themselves. The digital files can also be used multiple times. One of my customers like to add her vinyl wall designs to t-shirts.