Welcome to the forum! As Matt said, good list and great start. You're well on the way.

The motors are back in stock now, unfortunately the 10a ESCs will be a while as the supplier (Botbitz) goes through some changes. Hoping to have some in time for the champs in November, though.

The ESCs you ordered may not be reversible. Hopefully they're fine, but most solutions outside of this community are unsuitable for our needs. They should be more clear on the listing. Fingers crossed!