Raising out brine shrimp is generally a pain in the ass. You can't grow it in very high densities, or it tends to crash. It takes 6-8 weeks to grow out.
I'm currently experimenting with growing it in 40 gallon tubs in the back yard - only one fish store carries brine shrimp anymore and they often have shortages so I'd like a back up culture. But I live in wisconsin, so I can only do this for the summer unless I magically find more space inside the house before winter.
Low and flat are what you want for containers for optimal growth. You also want to only use a weighted airline (no filter, no air stone) and have to get the flow just right to not buffet them around too much, but to allow for enough air to keep the water moving. Which makes keeping water quality high difficult. They are rather tolerant to bad conditions, but it can get *really bad* quick.
You can feed live algae (phytoplankton), an instant algae type food (frozen or refrigerated algae), or spirulina. Live algae is going to pollute the water the least.