Even the printers themselves wouldn't be too expensive, despite the terrifying replacement cycle.
As for the main question: Of course this all depends completely on what kind of printer is used. I'm sure there are much faster printers available that are also much more expensive. But for the sake of the article, let's look at the rest:
The paper would be about one cent per sheet, which means you'll be spending about a thousand dollars a day.
This seems a bit steep. Even at consumer quantities, one can find paper at € 0,004 in the Netherlands, so in the US it should be less, despite the somewhat cheaper dollar. Also, at 100 pages per minute, one would need 8640 reams (500 pages) per month. I'm sure you'll get a much better price when you order so much paper. All in all, paper should cost no more than about $500 per day
You'd want to hire people to manage the printers 24/7, but that would actually cost less than the paper.
Now here's were it gets really interesting. You'd need at least 1 full-time employee to mind the printers 24/7. Refilling the paper and ink, taking away the printed paper, helping out when paper gets stuck etc. In the EU, the average cost per hour is €23,50 x 24 hours = €564 = ± $750 (today) to manage the printers, more than the cost of the paper
Of course, if you'd really want to maintain a paper version of wikipedia, you'd need a lot more people to keep up with the 100 pages per minute print-out, replacing the pages on the fly. Even if they work without breaks, in 8 hour shifts, they would be very fast if they could replace 1 page per minute in the huge set of volumes. At 100 pages per minute, you'd need 100 people x 24 hours x €23,50 = € 56400 = $75000
per day. So as usual, in a real-life situation, labour would be the largest cost
, by far, not the laser printer toner.