Yeshivas are very expensive and its a major problem without much solution. IMO if a solution is not found it might destroy the jewish community
You rav is wrong, he cannot expect you to spend money you dont have
Dont be so sure that Dorming is a good idea for your son, it might work for some, but it doesnt work for others , some kids do get homesick and are not really mature enough to live away from home.
Most of the yeshivas that have dorm do not teach secular education. The more modern schools that teach good secular education do not have dorms. The only except might be MTA, but that is very expensive