Financially we could look back.
Not sure that 50 years worth of data could be found.
This goes back to 2011.
https://www.travelstats.com/qimpacts/newhampshire
Has some data breakdown that can be useful.
But if the Air bNb (short term rental) is paying the M&R Taxes as it is supposed to, that data would be in there.
From what I can make out it appears to have grown reasonable to expectation.
I think what the STR, for all of its headaches, may be doing is providing that higher end experience at value.