Yup. My wife is pre-diabetic (and has PCOS for the folks who think that's just a nonsensical excuse) so we try hard to avoid sugars etc. It's almost impossible without a very limited diet. Everything has huge amounts of sugar thrown in, including things you wouldn't expect like processed meat or savory sauces. It's difficult and expensive to eat healthily. Veggies are expensive, making everything from scratch to avoid the pointless sugar is time consuming and expensive etc.
Yup. I'm what I would call pre-pre-diabetes. A year ago, my fasting blood sugar was 100 and my A1C was a couple tenths high, but not technically in the pre-diabetes range. Doc said I needed to lose weight (was 205) and avoid carbs, starches and sugar. It's hard. Everything has one of those three. You either go all meat or have to eat so many green, leafy vegetables eating becomes work. My first yearly physical after finding out I was edging into "diabetes-land" is next week. We'll see if losing 25lbs, mild diet changes, and ramping up the exercise did the trick.
Frozen and canned veggies can be quite reasonable in price.
Canned veggies tend to be high in salt and/or mushy. Frozen is better, but not by much. Selection is fairly limited in either case.
Financially, eating a diet very high in fresh veggies isn't a problem, but you get to a point where you've run through the produce section 2-3 times, even sampling the weird stuff, and you're just plain sick of it. It's tougher when you have two picky kids and an equally picky wife and have to fix your own veggies.
Chris