I think his expectations of the move maybe very unrealistic, but can appreciate that maybe he sees it as 'better' for your sons to grow up in a more rural and relaxed enviroment.
However there are many anecdotes of people who move to the country to give the children the idyll and buccolic chidlhood who find it actually very restrictive , you have less public transport, less cultural opportunities, friendship pools can be smaller and often it is quite cliquey.
If your boys are going to go to state school, these can be very small in rural areas which on one hand is lovely but again limits social connections and opportunites for team sports etc.
If they are going to go to a private school you maybe in for a lot of driving ( I did this ...45 mins each way !) and friends are scattered oftne over wide distances.
You say your husband is going to be travelling a lot for his job, so basically you would or could be looking at being left in his rural idyll perhaps your rural hell for periods on your own...if rural life was never your thing or dream or aim i would say dont do it.
but second the suggestion of a little holiday house to trial it....and find out how committed your dh is to the idea when it is middle of winter, too cold/dark etc to go sailing /beach etc...your boys are all bored and fed up , there is no friends nearby to play with and nothing like a cinema or bowling to go to within an hours drive !!!
I dont want to come over very negative, country living is great and i do still live in a very rural place , but i also have crash pad in london and my dp and i split our time...older children so not an issue.
when i was married and my dds were younger we lived in rural village...dds loved it, had dogs and ponies and messed about in local woods etc...but i hated it , suffocating, middle class mummies, no one had a clue what was going outside of their little rural bubble, stifling dinner parties talking about pony club and nannies....etc etc...when dds became teenagers it was nightmare of endless ferrying around .so maybe i an biased .