So I really think technical equipment will be the main part. And for a circumnavigation you need to take a bit more food with you (enough for may be 2 month?). Water can be reduced if you have a watermaker.
25 kg for the alps is quite a lot I think. I cycled through India for 5 weeks with just 7 kg on my back. But India is warm and a you can have a hotel room every night.
It seems that both of you have passed the test regarding spartan spirit to cruise in the Pogo 12.50.
Fact is that in what regards cruising it would be fine with me, even for extended cruising.
What the Pogo cannot offer is a comfortable ambiance for living aboard for extended periods of time and I want not only a boat for cruising but also as a "second home", and for that I find the Pogo to spartan for my taste. That's why I am dreaming with the Salona 41: Less expensive, fast (faster upwind slower downwind), with a bigger loading capacity and most of all, with a much more comfortable ambiance.
Funny that one of the things that comes to my mind is that in the Pogo, even with a good sound system, you would never get a decent sound. All that reflective plastic will make it impossible, and that for me is a big problem: I just love music and that is important for me (odd isn't it, I mean that it can be for me a decisive factor on a boat selection
But If I planned doing a fast circumnavigation perhaps I would have chosen the Pogo. On a mostly downwind affair, like a circumnavigation, there is simply no other boat that can be compared in price for speed, safety and fun of sailing.