The best bang for your buck is at Ikea.

I use Deli cups and other plastic pails from Amazon for S/H but sometimes the plants can grow really tall and tip over. Not fun when they're full of round LECA pebbles. Ceramic pots help keeping the plants in place.

A while back, I ordered a box of Carlisle Classic 27qt. crock containers, which are a bit heavy but wide lid 6" net pots fit perfectly over them. I thought the clear ones would be aesthetic since I could monitor the roots, but algae was a huge problem. With the colored ones, I never had algae problems, and in fact the oldest plant I still own, a Dendrobium goldschmidtianum, has been in a netpot suspended over a partly filled resin pot (used to be in a crock pot).

I also bought a box of Genpak SC032 deli containers, which are more like 5.5" wide, 4" high saucers that are stiffer than the ones they sell at plant stores. The standard slitted 4" or 5" orchid pots fit into these and they could be functionally semi-hydro if allowed to be watered until overflow. Or as I do, water them a bit lower. Not as pretty as a cache pot, but not ugly, and rather space economical. You could buy decorative plastic or resin pots without holes punched in the bottom at a big box store like Lowes, if you get lucky to find one at the right size.

I bought both of these at restaurant wholesalers online, by the way, like Splyco or Katom Restaurant Supply.