What a ridiculous argument! I get it if you are working as a chippy etc but most of the folks on here are hobbyists and do this stuff in their spare time.
The cost of the tools required to build this (or any project) is virtually irrelevant. I didn’t buy my circular saw to make this project and then throw it away, it will be used for many projects and given that I’ve had my saw for over 20 years I’d say the cost per project is very low. Yes, I used my Domino but I didn’t buy it especially for this and could have easily built it without.
It took me a few hours to build it but that was time I’d have otherwise been reading or watching TV so I don’t place a value on it.
In a commercial environment time is money but in our home workshops time isn’t valued in the same way. If it was none of us would ever make anything as it’s almost always cheaper to buy it from some god-awful tat shop.
I agree that a retired person doesn’t have to consider his or her time, in such a manner but too many people do not consider their time In such a manner.
For example, you’re a single person so your time is linear. If you’re working on ‘x’ than you cannot be working on ‘y’. You don't have other people who can work on things for you.
That’s where buying something comes into it. You’re not just buying a product. You’re paying a company to rent a workshop, to hire workers, to train worker's, to create supply chain relationships and to get them to make something for you to do a job, that improves the use, of your linear time.
I’d be interested to see a router table, stand and fence that was made in a few hours.