I really dont understand. Im deploy rails webapps all the time with pretty large postgres backends.<p>You could totally spin up multiple digital ocean instances to get a much cheaper infrastructure. I usually use one for load balancing, 2+ for running the app, and usually one for the backend postgres. You could also get away with using something other than digital ocean for the postgres.<p>But for 6000 users, depending on the app. I can probably get away with like $30 a month with this setup. Including the database.<p>Total setup time might be a day the first time. But it scales pretty well, costs significantly less.