until you're willing and able to make the jump to professional-grade racks, my best advice would be to purchase from Reptile Basics (RBI). in my opinion Rich makes the best rack systems available for the price. their customer service is also pretty much the gold standard for this hobby/industry, and their lead time is the best I've encountered. I've purchased from Boaphile and Animal Plastics as well, both of which I'm happy with, but they have their respective drawbacks. whenever I can afford it, my next rack will come from ARS without question. I recently bought a rack from Freedom Breeder for my adult balls not too long ago, and I have not been overwhelmed with satisfaction. it's certainly well made and functional, and I have no complaints about how I was treated as a small-time customer, but overall I don't think I'd recommend FB over other options.
best of luck. you're doing the right thing by planning ahead.