The event submit form is located in the front dashboard, under My events menu see attachment. Also, when logged in on create event page here is a link that sends you directly to submit event page.
Regarding the vendor payout. The system works like this: You get all the money on your paypal account or stripe or payfast. The system calculates the vendor revenue and shows it on his account (see attachment) and he must request payout to you to send him the money. He can chose the way: PayPal, Skrill, Wire transfer (see attachment). Once the request is submitted you will have a pending request in the admin (see attachment). In the request details you will have the transfer option he selected and the amount. From there you can update the request status: In Progress, Completed and Cancelled.