I am quickly coming to a conclusion that I'll need to buy a compressor for lots of little things like blowing the dust off after sanding something. No idea what size or CFM I would need for air tools and spraying. Lowes doesn't have a good selection and I'm afraid of going "too cheap" on something that really will last a long time in the home garage.
For the small job I have, I think I'll skip the epoxy primer for a simple undercoat of paint between the panels. The whole cab will be blasted at some point in the future and that's when it'll make sense to outfit the paint booth