From a production stand point we can make an educated guess and say that it has a pretty big budget, how big exactly who knows, but I doubt it's as big as other better-known, or more popular shows, if I had to guess, Satelight is doing more with less, in other words they are putting out a lot of quality work compared to the budget they're working with, we also have to keep in mind that as a package Frontier is pretty ahead of the curve, CGI work, Music, mechanical design, action choreography, editing, backgrounds, honestly I haven't seen any TV show with backgrounds that look like anything in Frontier.
Hopefully later on we'll get actual budget numbers on a per-episode basis, if it turns out to be less than what we're guessing, it'll just show how good Satelight has become at delivering production value.