What a great deal! I would be all over that. As for stacking, where there's a will there's a way. Stack it so ends are offset like bricks with gaps between and you can always sticker rows like cut lumber, or you can always do it like this.
Its not so much the slabs as it is the blocks...those are difficult to deal with...but I think OP found a good solution!
That’s a hike lot of wood for that $$. Hard to even justify cutting and splitting for that. Except for the exercise and fun of running your saws!
I have bought some a time or two, but the stacking was a challenge. Now that haus holsen is part of the stacks, I am thinking it would be good filler . May make a return to the mill.