There's quite a few videos on YouTube for DIY fluid beds. Couple 2" connections and an aquarium aerator and you're in business! I'll be trying my hand at building one this evening
I made one of these, its pretty easy. I often dont bother with the air bed tho unless Im going to paint a LOT of jigs the same color. Usually I make 10 of this color, 10 of that and its a pain to keep switching paints around in the fluid bed. Instead of using white for a base coat, I use pearl, basically white with a shimmer. Its my most used color so I bought 1lb of it... Columbia coatings has a LOT of colors much cheaper than the special jig powders.
Also if you can find a toaster oven, they work great for heating jigs prior to dipping and also for curing after they are dipped. The jigs hang easily from the metal rack inside, just get a forceps long enough to reach all the way in to grab jigs and hang them back up and you are set.