Hi there! the rates you see online are promo rates. Those are valid for the promotional period, then the hosting companies renew your account at full price. So if you are trying to save couple of bucks a year, then you need to be jumping form provider to provider after the promo period ends. For most people out there its not worth the time, especially when hosting companies are making it deliberately complicated to move away to another provider.
Your model is very straight forward and simple. Any hosting provider listed here: https://webhostinggeeks.com/best-email-hosting
will do a good job with extras over godaddy.
Hope this helps