If I was going to buy a more specialist knife I'd go for something from the likes of Loz Harrop, Jacklore, Bison Bushcraft or Chyrose, also the Northumbrian is putting some tidy work out
Not enough hours in the day lol
Frame work made from existing tree trunks cut down to required height and some birch rafters, this will be covered with a tarp and lighter spruce branches etc to double up as a log store, and wildlife watching hide