I'm currently breeding Macrobrachium dayanum (Red Claw shrimp), a species of freshwater prawn.
I've got four tanks 3 10g 1 15g. One tank to house the breeding adults and three for grow out tanks. Red Claw shrimp are more aggressive than dwarf shrimp, though they are extremely docile for prawns, so adults cannot be crowded like Ghost, RCS, CRS, etc... I'm selling groups of 6 juveniles for $15.00 online, and larger groups to LFS.
I sell the juveniles, at about one inch, to prevent deaths from fighting.
For filtration, all shrimp do well with cheap air driven sponge filters. This also keeps the larval or young shrimp from being killed by the filter.
I got the 10g tanks for about $10.00 each and the filters for about $8.00. I also have heaters, the weather here gets cold. Most are cheap filters that cost about $15.00. I built lids from acrylic and florescent light kits from Home Depot, say ~$10.00 with the tube costing ~$15 (full spectrum).
The tanks are kept on a heavy duty metal shelving system that cost $35.00.
I currently have 3 adults; 45 1+ inch juveniles; 15 1/4 inch juveniles; and another brood that will hatch in another week or two.
For shipping, I purchased a package of breath bags and use USPS flat rate priority mail boxes. The boxes are free, but it's ~$8.50 to ship anywhere in the US.
I haven't tracked how much it costs to run the filters and lights (the heaters really don't run much right now).