If you want a small air user definetly look at the conventional guns,
HVLP's love air and use a lot of it.
I recommend this to people a lot when thay have a small compressor.
I used one for years with a tiny compressor, they take low cfm and can
spray at less than the psi suggested and still give a great finish.
At the lower psi the cfm goes way down.
I sprayed with around 30 to 35 psi and had a 3/4 hp compressor keep up.
I painted several cars that way when I was first starting.