trade the 10 for a 20. You will have better luck generating income.
I've recently raised ocellaris in 10s and 20s, and although all things are not equal, the fish grew faster in the 20. If you want income by next year, you will need all the help you can get raising perculas. I've heard they take longer to grow out than ocellaris.
If you are stuck with two 10s and are serious about income, may I suggest that you devote both to the perculas? One for a larvae tank and one for grow out. The first few hatches will be your learning curve, and you can then combine the survivors in the second tank. It helps to have a dedicated tank for larval rearing. Then when the big successful hatch followed by metamorphosis occurs (100s), you just keep them in the hatch tank until grown.
I also suggest that you get a larval snagger put together. The version I use is cheap and effective. You can collect more larvae with less damage to them than any other way save transferring the rock with the eggs on it. If you want to make money, you have to be efficient.
Well you didn't ask for advice, so I hope you don't mind that I'm offering some, for what it is worth. Free advice is worth the price. We all wish you a lot of good luck.
Kathy