Nope on the price range, some people are putting shop class skilzz to the test making a form of slot riser/GPU separator so you will need the slot extenders to plug in the cards, have gaps between them and a classic desktop case look for huge size, almost nothing inside appeal. Some people are out there selling a ' mounting kit ' that is just aluminum rails for doing just that, and the odd one pre-drills for the GPU bolts.
If you can work with wood, it's not hard to get a 2"x2" across the back of a case to raise all the cards and a second board to connect the cards to, you just can't use a ' standard ' case. One thing I keep not seeing with these is a cheap eBay hard drive cooler fan or fans connected to a power supply across the ' front ' of what would be a case to help blow air in to the rig area.
Then again, there was one post where a miner uses Plastic Milk Crates and just stacks every thing in there and stacks the crates.
Hope this helps put some evil ideas in to your head how to work around ' design flaws ' or as Microsoft used to call them...
" Features! "