I do fly Sovereigns and that is a very capable airplane, 8 Pax plus luggage 1500 nauticals is a no brainer, one would be able to tanker fuel if so desired. (ones dest cheap, other expensive...)
Corrosion...there are some Sovs here in Europe that suffer badly from Corrosion, others donīt. Cessna says, thats due to the environment friendly deicing stuff we use in Europe. No issues on ours but for the Gear that was partly corroded on the inside (Shocks!) after 8 years. Airplane has been checked and then sprayed with CorBan, seems to work fine.
Still there is a Phase 42, corrosion check every 6 months.
Every airplane will suffer from humid and salty plus warm air.
The Hawker I hear is a full seat, full tank airplane capable of going 2300-2500nm and there are plenty around.
One thing not to underestimate if you operate where you say you want to: aircondition. Works pretty well on the Sov after 2 SBs.