Sat phone is to SSB/Ham radio as cell phones are to VHF radio. One is point to point telephone, the other is a true "radio".
If you have a Ham radio that can receive outside the Ham bands, provided you have a ham license, that is all you need. The radio will get all the wx stuff and you can call for help/send email/do phone patches etc on the Ham radio. One of the few advantages of an SSB would be for commercial traffic. In the Ham radio world there are always thousands of folks hovering over radios and listening, guaranteed.
There is a tide in the affairs of men,
Which, taken at the flood, leads on to fortune;
Omitted, all the voyage of their life
Is bound in shallows and in miseries.
Shakespeare, Julius Caesar IV, iii, 217