One Readers Opinion.
Not that we can't all dream of such a thing. It's all about the benjamins. Extremely cost prohibitive. I was reading an article on Milwaukee 261, obviously not a Big Boy, but it is "half" of one. The figure to get it running in 1998 dollars was $750,000 with mostly volunteer labor. Today you can figure a cool million times two for a Big Boy. Just to get it under steam again. There would be some issue with boiler overhang on mainline curves, i.e.cornering signals, trains in sidings, etc. There not being any turntables large enough to turn a Big Boy is irrelevent and so is its weight. A wye is perfect. If a Northern can make it around it, so can a Big Boy. As far as the weight goes, it may be a 1.2+million pound locomotive but all the weight is displaced. For instance it has 540,000 lbs on its drivers / by eight axles = 67,500 lbs per axle. A C44-9 has 400,000+lbs on it's drivers / six axles = 66,666 lbs per axle. Get it? As far as us shipping one off to Abu Dhabi to have a stainless steel boiler fitted out, re-tubed, and tested. I'm not even going to respond... and that may be quite possibly the stupidest thing I've ever heard of. We do it in the USofA all the time. FFS it would cost a hundred thousand dollars just to ship it there.
So maybe we should all write Warren Buffett a big sappy letter for a "TEN MILLION DOLLAR DONATION". The man does seem to love railroads lately. Because after you've got your Big Boy, bought and built a home for it, connected it to a main, trainsported it there, found enough volunteer experts to work on it, disassembled it, removed all the asbestos and lead paint, inspected the boiler and every moving part, replaced the tubes and staybolts, reassembled and tested it you're still only half there. Then there's the 25+ passenger cars you'd have to beg, borrow, or steal. Insurance, marketing, more volunteers, finding enough people to ride the dam thing, and a railroad that is going to let you use their main that's close enough to a population base so that going to ride the train isn't cost prohibitive. Oh! Did I mention insurance? After all that you might have enough money left over to invite Warren out for a cup of coffee and a slice of pie.