This looks like great fun.
The cheapest option to actually get the game, inc postage, works out at around £44. That's at the lower end of "premium" games, but the upper end of the class of game this looks to be.
I am put off by the pledge levels; you need to go deep (now 445 CAD) in to get anything that wont be around for retail, and the pledge levels to get a second, or third, boxed set arent at any discount and nothing extra added. No incentive to go to that level.
Good luck to them, they've already hit target, but as much as I want to play this, I'll wait for it to hit the shops and buy it from Grumbledook @
https://explosive6.com/