I don't think any of us would have a problem with sitting in the co's seat offshore for 6 months to gain hours on type providing the guarantee of the captaincy at a specific SAR flight thereafter was honoured.
So....you are saying you would suffer the agony of being a Co-Pilot for up to Six months so long as you get to keep your same old seat as you have now and become a Captain after six months with the company along with a new Type Conversion thrown in for good measure?
My....you don't want much do you?
I can see the seeds for a very happy crew room.