You should make it much, much simpler to try out. Ideally hack it to where it's a single click to log in as some demo user.

Right now you're asking for 9 pieces of information before you even let people see what / how it looks.

Another thought, you could let people do a one-click deploy to Heroku from a private repo or something to make it less burdensome to roll out. This is sort of a middle step between on premise and full automated.