Use the search engine to find threads about this process. You need a press and some tools to use on the press. I have zero experience with this process. When you get your service manual you can more clearly see what’s involved. I would think a good machine shop could do it if they have the manual.
Someone drilled out their workbench to place the bearing in the proper spot, can't recall if that was a thread here, or a YouTube video, but that would be the most difficult part of the whole process IMO.
The service manual will tell you that you need specialized tools, which will be a spline holder and whatever else they use to pull/replace the bearing, so those things would be an additional cost, unless that's factored into your $800.
@Carlosralph, It really doesn't seem difficult for what you're proposing if you're at all mechanical adept, so you're the best judge of whether or not you will be able to pull it off. Do you have the boat at home, or at least access to be able to work on it where it's stored? If so, pull one of your pumps so you can see just how (not) difficult that is, and from that point, the second piece with the impeller is just as easy to remove. At the very least, you can inspect everything and determine if you even need to go all out, or if a more surgical approach would suffice.
I'll try to get you some more pics tomorrow, but I'm finishing out this season with what I have, and you may be in better shape than my "damage". The first time you pull it will be the longest it'll take you, and the second pump should take you a quarter of the time once you know how it all comes apart.
I've got my manual here as well, if you want more pics, but
@FSH 210 Sport seems to have you covered pretty well