Why transfer them 3 times? More risk doing that.. why not breed in the 10g filled about 1/4? That way they can be in there longer without being transferred.. otherwise, no point in transferring to the 10g for only a week or so.
I would use a snail at first.. place after fry are free swimming (some like to climb on the leaves that anchor the nest, etc). Then can continue to use a snail or can use shrimp in the grow out.
I personally use a single mystery snail in the 10g and my 29g grow outs, and also in the 29g grow outs I have small Ancistrus sp04 plecos that I then will put one in there. They eat anything from algae to live foods.. (basically small bristlenose plecos, only get to 4-5 inches - do not use common plecos, etc.. may have to go through a breeder to get some smaller, docile ones).
Don't turn the filter on until they are free swimming and strong enough - and make sure to use an air control valve.
What are you considering "normal water change regimen"? Each breeder does different.. some will vacuum multiple times a day, some will vacuum once a day, etc.