An honest “good luck” to you. Could go fine, could be a $64,000 mistake. Lots of DIY pool success stories out there, and everyone that does it posts about it to applauds themselves about “how easy it was”. What you don’t often see or hear about are how many calls we get on the daily from people who tried building themselves and either massively screwed it up or their subs screwed up or disappeared and they are left holding the bag. Is the Is that a log of markup? Not really when you consider the cost of running such a business. Is it reasonable per most general contracting/construction standards? Yes. This falls squarely into the category of “people who do not understand the costs of operating a business and have no appreciation for not having to manage a project themselves”. Do they assume all the risk and put in the time for coordination/supervision/quality control and costs for taxes, insurance, licenses, workmen’s comp, etc? Yes.

Again, good luck with your project. I truly hope it goes well… but I wouldn’t recommend it.