This is the classic "make or buy" decision. You can rent by the minute, or own your own. What the Amazon website doesn't cover is: - download guarantee. The

This is the classic "make or buy" decision. You can rent by the minute, or own your own. What the Amazon website doesn't cover is: - download guarantee. They rent you the antenna, they don't commit to a successful reception (and consequent refund if it fails) - link status report (needed for a positive confirmation of successful reception.) This is basically a series of SNR measurements - competition with other users of the same antenna: first-come first served? Maybe your spacecraft needs more storage to save the downlink data if the Amazon antenna is busy. And of course they don't talk about the competition.