I will be based in Taos.
With nothing going on in the Chama yard we might leave Taos early and do the train to Cumbres and bus back ending up driving back to Taos that night.
With yard doins' (the strange idea) we would probably drive to Chama and stay night 1, do the yard stuff and then stay night 2, do the ride and bus and then return to Taos.
Result:
1. More likely two tickets on the regular ride plus two strange idea tickets
2. Two nights lodging in Chama
3. Four dinners, two lunches, four breakfasts in Chama
We have no interest in staying in Antonito and would only stay in Chama for action in the yard.
4. Gawking shopping in Chama