Yes, definitely I'd buy 21mm track and points. The sales opportunity lies in the new modellers joining. One economical approach might be to create the sleepers for RTR track using 3-D printing, to allow an adjustable print-to-order. The track could be sold as simple kits -- sleepers in strips with rails to be inserted.
Meanwhile, I bought Irish broad gauge sleepers from the ScaleFour Society and bullhead rail in code 75. (Thanks, Jeremy Suter, for the help.) Just need uninterrupted free time. Working towards a combined MGWR Sligo line with Collooney Jct. to Dromod and the Cavan &