Simply press 'View Limits' above your baalnce and see if you are able to receive 7k+. Actually i wouldn't recommend you that.
I'd have to agree with that. $7k is a small amount as compared to what some of us receive in Indian Paypals. Make sure you are not using one of those "Virtual Cards" and have properly verified Paypal. In your case, since you have sent them documents it's looks all good. Also, a better option would be to make a call to Paypal, and tell them about the affiliate company and all. This way, you will be on a safer side.
Use better and safe money transfer method, the guy can ask for a refund from paypal after you have delivered whatever was promised.
Don't ever let that much money go into your Paypal account. They will most likely limit the account and steal your money for 180 days.