A credit to Node.js, but you don't have any redundancy with a single server. Also, for $100 on Google that's a small instance (1-standard-4)?<p>With MongoDB, you really should be running a replica set cluster which requires a minimum three nodes.<p>Anyway, if your hosting cost is $100 a month or it is $1,000 a month, both trivial compared to your time of working on the idea.