Ghettodactyl, I use steel garage storage shelves for my collection. They work great, affordable and the 24" depth is perfect for 1/3. You can buy them in different sizes and adjust the shelves. If you're handy you can spray paint them and hacksaw them to get the height you want. The steel surface does not bow under all that weight.
I hacksawed mine to half the height of the room so I can put some framed prints behind them and give Shockwave a home on the bottom where Lockdown is. Jetform Optimus is going next to DOTM Optimus if I can reinforce that shelf. I'm planning on getting two more from Home Depot and play around with the height to raise them off the floor to get a Swifter under them. If you have hardwood floors, get little square plastic feet to move furniture. I can pull mine out to get behind them.
Because they are not enclosed I use a fine painters/craft brush every other week and cans of compressed air once a week. Some collectors frown on the air. Unless you are holding the sprayer right onto the statue or holding the can upside down I don't see the issue. I have had zero issues.
I also have an Oreck air purifier in the room to get rid of dust.
I haven't figured out lighting yet but there are tons of options at Ikea or I just might pay an electrician to do some custom track lighting.
The steel storage from Lowes are the same but have a flat surface instead of a rack. I plan on getting one in the fall and experiment to see which one's better.
Here are links to both. There are other options on both sites and pictures of my work in progress.
Also for you Batfanatics you can get three Arkham statues on each rack. I've got Two-Face, Deathstroke and enough measured room for another i.e. Scarecrow, Joker or Catwoman to fit. Mr. Freeze and Croc are a tad too wide so they get to share a shelf together.
https://www.homedepot.com/p/Husky-78...W5BH/305885655
https://www.lowes.com/pd/edsal-72-in...g-Unit/1000527