How many ads can I upload at once

It depends on the Subscription level you have chosen on sign up. There are  5 levels of Subscriptions. These are Bronze US $150.00 for 5 ads.  Silver US$450.00 for 8 ads. Gold US $750.00 for 12 ads. Platinum US$ 1200.00 for 16 ads and Diamond US$1800.00 for 20 ads