Are you sure? 288h of allowed downtime is 12 days. After that the node will get suspended and will have up to 7 days to get back online until definitive DQ, see following thread for more details:
Plus, as you mentionned, the node will indeed have a lot of data loss on such a long offline period of time.
I wouldn’t “not worry about it” personnally and I think @RobTurbo’s suggestion is worth investigating.