Install something like http://osticket.com http://osticket.com on a small VPS and use gmail as the mail server, so you have a backup. You'll get a similar exper

Install something like http://osticket.com http://osticket.com on a small VPS and use gmail as the mail server, so you have a backup. You'll get a similar experience to a paid app. Upgrade to zendesk or something once you get a lot more users and you need to be able to track requests, or fork osticket and add your own tracking.