Information on subsidies is not easily available, nor is it clear to me where #TrenMaya stands in terms of ramp up. I could see that some routes further south, in particular #Chetumal to #Palenque only has one train a day. That is not a good way to manage your assets. Merida - Cancun - Tulum seems to reach a healthy number of services. So overall, I cannot judge the financial viability of the project but can only hope for the ramp up in services and passengers to continue.