I set up a cheap DIY hatchery and grow out tank to get them a bit bigger for my apistos but like you say with the air pump etc it's a pain to run and store
The artemia eggs can't get into the bit where the white cup sits as they need to swim there so it works well to separate them
I found I got about 2-3 days worth before no more would hatch, light amount after 12-16 hours, main amount hatching in 24-36 and a smaller amount after this, but this is very dependant on temperature so you can play about with higher temps and faster bulk hatching