We are working on adding the ability to setup custom submission urls for the Form Builder. Sending the user to the resulting listing, is not part of the plan. Our thinking is that the scenario is rare. Most customers require that the front end submissions are reviewed or require payment before posting.
Maybe in the case where BePro Listings is used with a membership addon, then the front end user would have the rights to post as part of their membership level. Is this your scenario or do you have another use case for the feature? ___ BePro Software Team