I have a double right now (one large, one small) and I use the small one to drip dry anything that doesn't go in the dishwasher. It's convenient, but even so I'm planning to switch to a single large sink in the future. I haven't found any double sinks that I really like, but I will admit I haven't seen a great solution to drip drying pots and pans. I really do use that second sink a lot (even if I towel dry my pots, which I don't usually bother to do, I still have to have a place to put them until I've finished the dishes). Most dishracks I've seen are intended for plates and utensils, which I just put in the dishwasher. If I can find a good dishrack for pots and pans, then I will be very happy with a large single basin sink I think.

Would you consider a single bowl sink? I have a 72cm*40cm Franke sink and absolutely love it. Items that need to be hand washed such as roasting pans are much easier in a single bowl rather than a double bowl.

anything is possible depending on budget but you'll need to find examples of suitable sinks (preferably several options with specific installation instructions that can usually be found on brand websites and printed out) then ask a kitchen cabinet maker (who uses Silestone counters) and a plumber to inspect the site and suggest options and quotes

Note - This is what I think of the concept in general. It's not a criticism again the OP - I think Butler's pantries are better idea's in concept than practice. I've not understood the rationale for a kitchen thats separate to your kitchen, unless of course you are prepping all your meals in there in which case what is the kitchen for? I think it's a sign of the times that we have more space and more money than we know what to do with when we start installing two kitchens in the same space. Of course I understand the rationale for a pantry. A place to store food items that may not be used frequently and the same for appliances. In the days when food was only available in season and the only way to preserve certain foods was to pickle and bottle it then a large space to store those supplies was necessary. We live in the modern age now where any food can be gotten easily and cheaply all year round. So these spaces are housing mostly appliances that we rarely use. And if we rarely use them you have to ask yourself why you are holding onto them?