2 of us in my office, using 5 printers. 3 basic monochrome printers (Brother 6200DW, Brother 6300DW), 2 multifunction printers (Brother 6800DWT). All use the same toner and drum, which lets me purchase multiple units at once. No need to buy color. All printers are dual tray.
I replace the oldest printer every year. Donating the used printer to my local food bank, clothing bank or literacy program gives me a nice tax credit and keeps it out of the landfill.
To reduce jams, buy good quality paper. I prefer GP Advantage or Boise XP. Both meet preferred lender standards of 92 bright, 20 lb. Both very rarely jam. Costco flips back and forth between them for best price - I can usually get a 10 ream case of letter for $33 - $35, delivered. I buy them in 10 case lots and save a couple of bucks more on each case.
Another cause of jams is an old or dirty drum. Pull it out and clean the corona wire regularly. Use a spray and blow out used toner and paper dust that may have accumulated inside the machine and the drum. (Take the drum outside - it's messy). This will also help with the occasional creasing.
If I ever mistakenly purchased a printer that was not dual tray, I would use the bypass to print legal.