My suggestion has been 2 hour lessons twice a day with a good break in between.
A lot of time is consumed with start-up, taxi, run-up and transit to practice area; then back Yes, all this has be mastered, but with 1 hour slots it becomes a major part of the hour$ u$ed up.
Flying once a week allows stuff to be forgotten. Frequency enables reinforcement.
Bottom line: an intensive course maximizes the efficiency of the flying hours.
Be very careful of paying large sums of money up front Flying schools do go bust from time to time and students can end up losing money on deposit.
If thinking of the US, have a look at Canada. Exchange rates may be advantageous.
That said, Spain pre Brexit may be the best solution