I've seen a gti pro just over my budget but I might get thatI have a gti pro with. T110 aircap and cant fault it but don’t do this for a living. Believe it’s now discontinued and has been replaced with gti pro lite but may be a bit above your budget. But need to check if compressor has enough output if going to run for any length of time
The one I've seen is a t10 for basecoatBelieve that T110 aircap uses the lowest amount of air at 9.4 cfm