Howdy Anthony and thanks for getting in touch!
Our free The Events Calendar plugin will provide what you need for publishing events and our Community Events add-on will allow guests to submit events to the calendar. I am afraid, however, that selling featured listings is something that our plugins do not currently support.
Good question about set-up services. We do not provide that assistance directly, but do have a list of freelancers who we would gladly recommend for that level of support and I’d suggest giving that a look.
Does this help answer your questions? Please let me know if you have any others and I’d be happy to help as best I can. 🙂
Cheers,
Geoff