If I had 10k to spend, I'd replace all my racks and probably buy a few more. Make sure I had several baby racks and invest in a larger incubator. Lets see if I replace 3 racks, that about 1k. Then I would probably buy another 1k in racks, giving me another 11 tubs. So that leaves me with 8k. (this is fun!)

Cinnamon Male
Mojave Male
Mojave Female
Albino Female
Pied Female
Het. Axanthic Pair
Clown Male
Yellowbelly Pair
Pastel Female
Lesser Male