Especially where one of the parties normally lived outside the parish, it seemed quite common to use an address of convenience. Many seemed to reside at the place during the Sundays when the banns were being read, and went back to work for the weekdays in between.
Having the banns read in two parishes cost more, because you had to cough up for a certificate from the clergyman in the other parish to verify that the banns had been read there too. Getting married in a place where neither party was normally resident would involve three sets of banns and two certificates.