In my opinion, most of the assemble/dissemble wear and tear is on the brass threads of the first stage, and 1st stage side hose o-ring, not so much spinning a second stage onto the other end of the hose.
Possible compromise - especially if you're keeping everything in the same family with the same IP requirements - have a set of first stages and hoses for your different configurations, and limit the number of second stages down to 2 or 3, spinning them onto whatever rig you are diving at the moment.
I do something sort of similar, travel with 1st stage in a yoke configuration and have a couple other 1st stages in DIN with 5th port for use back home. After they are cleaned up and dried out, the 1st stages with hoses still attached go back in their own regulator bags, and later just spin on the same few 2nd stages on any of them which takes no more than a moment.
Possible compromise - especially if you're keeping everything in the same family with the same IP requirements - have a set of first stages and hoses for your different configurations, and limit the number of second stages down to 2 or 3, spinning them onto whatever rig you are diving at the moment.
I do something sort of similar, travel with 1st stage in a yoke configuration and have a couple other 1st stages in DIN with 5th port for use back home. After they are cleaned up and dried out, the 1st stages with hoses still attached go back in their own regulator bags, and later just spin on the same few 2nd stages on any of them which takes no more than a moment.