At time of writing, the simplest to use and most economical ticket printer we have found is the Dymo LabelWriter 400. It is a thermal printing that requires special thermal printing paper but does not need toner.
The best ticket roll we have found to print with is the DYMO 30374 Appointment Card. It is the only non-adhesive DYMO label in the ticketing size range.
Figure 796: Dymo LabelWriter 400