So the weirdest goddamned thing just happened
The 2x6 boards will be the bottom level of support, supported by handi-block concrete blocks as seen here:
Shop Handi-Block 4 x 4 Handi-Block at Lowes.com
I go to Lowes to buy all of my supplies this morning, priced it all out yesterday on-line. Plenty of lumber in stock, like 100+ handi-blocks, etc.
I get to my local Lowes, and no handi-blocks. They have the older style deck-blocks that are 100% pure concrete and weight 40lbs apiece, but I wanted these newer handi-blocks because they are some sort of concrete/polymer mixture that was just as strong as concrete but less than half the weight(and cuttable with a normal hacksaw)
I ask an employee where the handi-blocks are, and he's never heard of such a thing. I go to bring up the link on my phone (posted above) and it gives me a lowes.com 404 error, page not found. WTF. I swear to god I was just looking at them yesterday and every lowes around me had 100+ of them in stock. Then this morning they're gone off the website(are now showing back up again but out of stock at every single store near me)
I wonder if its possible that I happened to catch them right as they recalled or stopped selling the item or something? But the employee acted like he had never seen them in the store, ever.
There was even a review of the product on Lowes.com commenting on how the person was glad that Lowes stopped selling the 100% concrete deck-blocks and switched over to these much better handi-blocks, But nope, nothing but concrete deck blocks in the store.
I think I'm going crazy...