Depending on how many you want to grow at a time, and, in what size of container, it can be very easy or it can be labour intensive.
Sparsely populated cultures can be grown very easy in large quantities of water compared to shrimp densities so that water quality doesn't deteriorate too fast. Feeding very light with foods that stay in suspension is a key to longevity with less work.
On the other hand, I prefer to raise large numbers of the brine and this entails more work proportionally than the simple way.
The more you grow in the same size container, the more work doing water changes.
I used to grow phytoplankton and supplement feeding with a "spirulina ball" that fogs the water, but now I primarily use Tahitian Blend, a cryopaste.
I also used to recycle the water with bio balls in garbage containers, but now, using a cheap home made salt water formula, (Randy Holmes Farley advised on quantities of the chemicals I use) I pulled the bio balls and grow the brine shrimp in the 20g garbage pails, and I have 55g olive barrels on hand for expansion.
For the basics of my operation, see my brine shrimp page, where it describes and shows, my basic set up with some addends at the end for some changes I've made.
RAISING BRINE SHRIMP
At the bottom of the page there are links to informative sites, especially one from a United Nations PDF on Live Foods For Aquaculture from the Laboratory of Aquaculture & Artemia Reference Center, University of Gent, Belgium, which includes a large section (section 4) on Artemia, that includes nutrition, feeding, commercial sized grow outs and more, that one can use to scale to their own operation.
If you click on the square box between the two arrows at the top of the page, you will get the table of contents for the complete file which includes information on micro algae, rotifers, the above mentioned artemia, zooplankton, and daphnia.