I am not sure on the specs of air dryers…but if you want to keep costs down to start there is nothing wrong with desiccant dryers…
I have one and was building the money till I can purchase the better dryer.
I recycle my beads all the time by just putting them in the over to get the color back.
I would start with the compressor for future needs to start.
then build a copper pipe air cooler to start…then put in the bead dryer before the plasma…at a later date just add the refrigerated dryer between the copper and the bead dryer…that way you wil have supper dry air…and at the very end before the plasma…really good filter.
I use the Harbor freight Dryer. No issues for the last year, consumes the desiccant very slowly with the dryer going. But, daily changes were bugging me, so I’m throwing up a copper manifold prior to the dryer to take it even further.
I have 4 HF water separators in line with desicant in each of them. I was toying with the idea of a whole house water filter filled with desicant. Also I see window AC units for next to nothing or free on CL and wonder if that might work as a condenser snaking the air line arond tge consenser?
I have a Schulz ADS20 with a motorguard filter downstream and the motorguard is as dry as the day I bought it. I live in Tennessee and humidity is hell in the summer.
I have a common moisture and oil separator that feeds a MotorGuard filter and the air at the end of my hose is dry and works perfectly for sensitive painting. I even use new rolls of toilet paper as filter elements when I forget to order more MG filters. I’m going to hang another MG onto my table when I get it.
I built my air dryer from a F-150 condenser and I’m up to 1500 pierces so far and my tip still looks amazing. I have less than $100 bucks into it with a double water filter and my machine is running great.