Aside from getting rid of it, I think it comes down to spending within your values on what is important to you. Would this really improve your life in some meaningful way? Maybe, or maybe not.
If you can wait a while, generally the large storage bins go on super sale after Christmas. I'd try to wait and stock up then if you decide you must do this and you want only one type of bin.
For keeping stuff off the floor, can you just lay down for bricks as feet/risers under the bottom tote and then stack? Not only do you save money on shelves, but you actually use the space more efficiently because there are no gaps where the totes don't quit align with the measurements of the shelves. If this is tuff you access regularly, it might be a pain, but if it's annual stuff, the stacking shouldn't be an issue. And you can always put the more frequently used stuff on the end stack at the top.