Take a look at Amazon Redshift (I don't know if you have a higher time budget or a higher dollar budget for what you're building, but Redshift might turn out to

Take a look at Amazon Redshift (I don't know if you have a higher time budget or a higher dollar budget for what you're building, but Redshift might turn out to be pretty cost-effective when you add in system upkeep as well). It scales well.