ah hadn't appreciated you had an 10/11spd hub issue too! you could send those wheels on their way with the Ultegra on the other bike, but I'm guessing the Hope hubs are prob v nice and better than ones on the unwanted bike (which my not be 11sd compatible anyway) and you want to keep them.
You're right, take a breath, get everything together and have a good chat with the mechanic as to what is possible and what it entails & costs.
There isn't any great benefit of 11spd over 10spd, until a time comes you struggle to get hold of 10 spd spares, which is a few years off yet. If anything 11spd has sightly tighter adj / set-up tolerance.
There is though a benefit of having most of your bikes compatible (i.e. 10 spd SRAM in your case) so you can swap wheels & components around if needed / something breaks and you need to keep less replacement "stock" of chains & cassettes on hand.
I love the etched "lugs" on the
Condor, its super lovely.