Use the right tool for the job.[1] There are battery-powered tugs for moving server racks around. With a 3000lb 9 foot tall rack, this is not optional. Next problem is earthquake resistance. Any load that top-heavy needs to be secured to some strong column or wall. And four little casters for a 3000 pound load? Those are far too small for a load heavier than many cars.

Have they shipped this thing, or is that just a render? No cables are attached, so it's not in operation. It's certainly possible to make this work, but they have to get serious about floors, ramps, access, and structural support.

[1] https://www.phswest.com/product/4000sxhd-motorized-server-ra...