BigBertha You do not have to do anything (4 hygenist appointments a year). You decide what treatment/care you do or do not want, not your dentist. He can recommend only.
I think you need to sit down quietly with a cup of tea and think about where you went previously. Your previous dentists were also private dentists. If you had needed all the work this dentist is claiming you need, wouldn't they have noticed you need it as well and offered it? But they didn't, so the chances are you do not need it.
There are good dentists and bad ones and ones who want to make as much money as possible by persuading patients they need lots of quite unnecessary treatments.
The best and most sensible thing you can do is ask around in your area, ask people you know to recommend a dentist, but mainly you must go and see another dentist and see what they say you need and stop visiting this dentist, who sounds most unpleasant.