A few questions

First time poster on here. I was late joining the surfing party, I was 46 when I first paddled out. 12 years on, having spent 2 months each year in Bali/ Lombok/ Sumbawa I've decided that I need to paddle more regularly. So, I'll be moving to North Wales shortly. The water there varies between 8 and 15 degrees, a bit different from the 28 in Bali 
Anyway, I cant afford to buy a load of suits and other gear so have decided on a 5/3 and see how I get on.
I'll need gloves, a hood and boots. Is 5mm the best thickness to go for?
The place I'm buying is about 10 minutes walk from the beach. I won't have a car. Can you walk that far regularly in surfing boots without wrecking the soles a few weeks? Finally, is walking 10 minutes in freezing winter temperatures after coming out of the water going to lead to hypothermia, or should it be OK?
Cheers for any replies.

Anyway, I cant afford to buy a load of suits and other gear so have decided on a 5/3 and see how I get on.
I'll need gloves, a hood and boots. Is 5mm the best thickness to go for?
The place I'm buying is about 10 minutes walk from the beach. I won't have a car. Can you walk that far regularly in surfing boots without wrecking the soles a few weeks? Finally, is walking 10 minutes in freezing winter temperatures after coming out of the water going to lead to hypothermia, or should it be OK?
Cheers for any replies.