Some time ago on an art forum an artist asked how to go about getting an art grant to start a pet portrait business. That made me wonder what kind of expenses did she plan to incur? Fact is it costs very little to begin doing pet portrait commissions. All you need to get started are a few examples of your work, some business cards to pass around and a website to show your work and take commissions.
There are lots of places online where you can print up some biz cards at a low price or even make some yourself with your computer and printer as I did with mine. I slip a few in with the portraits I ship.
For a website there are a number of free services that give you a quick and easy way to set up a site such as WordPress or one of my favorites, Weebly Once you got that, the only thing left to do is find your customers. No grant needed.