uStar is included in UPA (but HomeZon and TraffZon are not). If you purchase HomeZon, you now have an additional tool to use uStar with. RepZon and uStar are the same thing.
You can bill the client through Umbrella's billing system, or charge yourself the wholesale price and bill your client using your own processing service (paypal/stripe etc.)
Month to Month or Yearly. The client can sign a contract for as short as month. There are no built in discounts for annual contracts but you can offer one.
Umbrella members pay just $125/month for packages that retail for $300-350/month. Umbrella and our partners handle all billing, fulfillment...you just need to make the sale! (And we include sales training in our course too!)