You don’t have to ceramic coat it, waxing is still a suitable way to protect your paint and make it look good. It’s certainly easier to do.
I personally would be sceptical of those who can wash/clean a car and properly correct the paint plus ceramic coating it for ~£400. Unless it’s a new car with fresh paint, or the guy is just starting out, it’s a very labour heavy task that can take days depending on the state of the car.
I use a guy who’s arguably the best in the business and he charges £300+ a day, with a full clean inside/out, correction and ceramic coating taking anywhere from 3+ days, depending on the car. But that’s wheels off, the who nine yards and he’s a perfectionist. I had him PPF my Cayman (incl correction & ceramic coat it), a year-ish on and it’s still perfect, not a blemish in sight.
Horses for courses. I have a 1.5 year old and I’m lucky to get a morning to jet wash wash my car every couple of weeks. At least when I do, all the crap literally washes off.