Yeah thats ridiculously expensive for a home lab IMO, the thinkcenters can be picked up for a couple of hundred bucks used and a T400 runs about the same. So $400 for an AI capable home bench would run $1200 for a 3 node cluster - I can live with that.
My 5 node Rpi5 Cluster ran $1500 with NVMe Hats and a PoE hat and cant do any GPU work :(