A 20g would be fine for a month or so. Not big enough for the parents, but for 1/2" fry that is a ton of room. After that do what Knifegill said and cull them down to around 20 of the best looking ones.
That is what I had intended to do DJ.Just temporary,larger tank when needed,no parents,but I do know someone who says they remove the female with the fry and puts them in a seperate tank for a few weeks then returns her back into the original tank.