Just in general, the fruitarian diet is very weak on protein. Granted, keeping your protein down pre-dialysis may help prolong your kidney's descent, but it can also cause malnutrition. After dialysis, you WILL struggle to maintain your albumin levels without a more "solid" source of protein.
The fact that you are in AZ (a warmer climate) should help. It's definitely NOT a diet I recommend for people in more temperate areas-- unless you like to be cold all the time. A good old ovo-lacto vegetarian diet is more balanced and better overall than an exteme fruitarian diet.
And don't forget a good chance of getting a vitamin b12 deficiency.
As someone who has been vegan in the past (preESRD), I'd proceed with caution. You REALLY have to know your nutrition and personal limits, especially if you're also dealing with additional health situations, like ESRD (or whatever stage you're at).
I'd strongly advice against going completely raw or all fruit because it's not a sustainable way to live. It's very difficult to get all the amino acids needed to make a complete protein, and the sheer AMOUNT you have to eat to get enough calories is ridiculous. ... Adding in things like beans, rice, and quinoa makes a huge difference. And, if you're not eating meat, the phosphorus content of those things is slightly less of a concern since you're not getting additional phosphorus from animal protein.
Your water intake would probably depend on how your function is now. I never had any issues with fluid buildup, and I still have a pretty good output. Obviously if you start swelling, stop drinking.
The other thing I would be very wary about is that the vegan community online tends to also be the same groups of people who believe any and every pseudoscience and anti-conventional medical theory on the internet. I'm in no way knocking homeopathic remedies, but we are in a situation where we're being kept alive thanks to that "evil modern medicine", so I'm kinda partial to it. I've seriously had vegans tell me I can cure my renal failure by doing a fast and loading up on water (NOPE!). So, as you're doing your research, keep that skeptical hat tight on your head and make sure whatever claims they're using this week has some actual research behind it, and not just what Daisy at the FruitFest heard from the guy with the beard.
Personally, I have better luck being mostly vegetarian with the occasional fish/chicken. I believe there are a few other members who are also vegetarian and have had good luck with that. If nothing else, having a few days a week where you strive to eat more than your 5 a day isn't a bad thing!
Being at stage 4, you definitely have more flexibility since you don't need as much protein as someone on dialysis. Plant based protein is recommended since it has a lot of other "good stuff" in it as well.If I was in your shoes, I would start slowly. Try being a part-time vegan. 2 or 3 days a week where you really focus on limiting the animal products and focusing on plant-based foods. Beans and Rice is a great complete protein when eaten together. I remember I ate a LOT of tacos as a vegan. Mmmm... tacos.It's certainly not impossible, but it does require a lot of research and planning. I know that I had a harder time with that than I expected - sometimes you just want to eat a dang turkey sandwich instead of trying to piece together a complete meal.