If I were you, I'd get a 3 gene male right away. That'll set you back about $2,500-$3,500 depending on what morphs are involved. Since you like Lessers, I'd say get a Queen Bee or Butterfly.

I'd get 3-4 adult Normal females that will be ready to go in September.

With the rest of your budget, I'd get a Piebald female or two, another recessive female, and if there's anything left, some co-dom females. All hatchlings-yearlings. Depending on what sort of deals you can find. Try to stay away from genes that are already within your foundation male, so you have more of a variety.

In September (or whenever), breed your 3 gene male to your normal girls and hold back all the females you wish.

This, in my opinion, would be the smartest way to spend that budget.

Good luck!!