Of course it would be good to have more than one attempt to rebuild tubes. Not only would there be twice the likelyhood of success, but the two operations could exchange ideas. There is a more elaborate rebuilding setup for sale in Texas:
http://www.angelfire.com/tv2/daryls_tv/page2.html
I suspect it could be bought for next to nothing, since it has been for sale for ages and there have been no takers.
As for the cost of insurance, this is one of many things that makes it likely that the operation is going to be a money loser, or, at best, break even. I'm not sure that it will be feasible to rebuild tubes for collectors, but at least we'll have the equipment on display for museum visitors to see how tubes were rebuilt.