In the Houston area you can get sand at several places. Where are you?
Northside - McCauley's in Tomball
West Side - Katy Hardware
Most Ace Hardware stores have it but expect to pay more.
Use #4 sand.
What type of blaster are you using? Pressure pot or siphon?
Air compressor should be a twin cylinder oil lube style. The big box hardware stores have a good model for about $400 but will need 220 vac service. If you are wanting to use a 110 vac compressor you will not get the pressure you need to blast effectively. Do not buy an oil-less type compressor. Will not last for your expected needs. Tractor and Supply stores had a nice compressor last time I was in there.
