I have a Newfie. She's mostly lovely now that she's 4 but she was a total dickhead for ages.
She doesn't stink, apart from her breath. I actually love the smell of her head and like to sniff it often.
She is a bit drooly, but nothing terrible.
She is a little Newf, only 45kg, which is 10kg smaller than the average for a female.
I pay £60ish per month for insurance, so it doesn't have to be in the £100s.
She has already had surgery on her CCL after it tore, and has since developed arthritis in that knee. The vet gave her plasma therapy (NOT covered by our insurance; lots of places don't cover this, it turns out) that has helped a lot. Vet thought her other CCL would go within the year, which is what usually happens, but it hasn't yet and it has been about 11 months since the first went.
She needs more exercise than people think, but still not as much as most breeds. We do a 30-40 minute walk on weekdays, plus play in the garden, and then DH takes her and the children out for a couple of hours at the weekends, which she loves. Of course, her exercise has been limited of late after surgery and treatment, but she'd happily do an hour or more a day and love it. Don't forget they are working dogs, even if as pets they tend to lead more sedentary lives.