The backend question is a big one and I agree that an RPi seems to be a poor choice. Samuel Stern has a MacBook Pro, which has much more power, single-thread an

The backend question is a big one and I agree that an RPi seems to be a poor choice. Samuel Stern has a MacBook Pro, which has much more power, single-thread and multi-threaded. Nevertheless it probably consumes much more energy than the RPi. Other people rent some server, e.g. Matt Might uses Linode [0], but something like $20 per month flat is really expensive, if you would use it rarely and not for business. Maybe Amazon EC2? Though I doubt it fits the use case of weekend use plus one or two hours per week day. [0] http://matt.might.usesthis.com/ http://matt.might.usesthis.com/