Not to mention, the management coordination and effort, you need to suprovise and make sure your getting what you paid for,

.

You can find remote workers for what your doing, US. or out of US.

Your not going to be able to get all US. workers if you want to stay to that budget.

Since you asked for the role breakdown, that suggests your really new to this.

At bare minimum, you need 1 administrator, 1 coder and 1 artist to lead in all those aspects, the rest can fall into place after those 3 roles are filled