Why not put your aero commander on the market and see whether it sells. As someone said, it wouldn't be a great idea to have two big old twins. That will probably be the deciding factor on whether you move on.
Also, why not see if you could lease something else for a few hours. If owners have them sitting idle in hangars they might be pleased for some income.
I have enjoyed reading you reports on flying the commander in the US, I'm jealous of everything other than your maintenance and fuel bills.
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