While you are correct that you can nuke a normal SSD in a month, you can buy high-endurance drives which will last much longer. For example, you can buy a p400m with 7.5PB of write endurance [1]. It's just a question of making sure you buy a part that matches your need.

If you're writing more than 7.5PB in a month... I'm prepared to be amazed :-)

[1] http://www.tomshardware.com/reviews/p400m-ssd-enterprise,342...