And so, if you get a modern instrument it will have waterproof glue and be much better than a vintage one for sitting on and paddling if you want to travel on a river or lake..............or am I off topic
I would be very careful to mention anything resembling Concertina in this topic.
It'll be totally inapropriate.
I don't think personal automobile is necessarily an addition to a musical instrument, and if you want to live on the island in the middle of remote mountain lake AND play concertina - you have to set your priorities and check finances. A concertina, a car, chicken every day, TV, radio - all are luxuries, taken for granted by too many, and for the wrong reason. I personally would have let go a chicken, a TV, a Car and a Radio. Then I'd let go musical instrument, concertina or not.