Exactly. If we screw up a board and get pissed off we can leave the shop and come back when we feel like it. If it's a job then you have to get into the wood stack and mill up another board. That's why if I do a commissioned project I won't do deadlines - I do this hobby to relax.
You're forgetting one major factor...the world keeps creating new woodworkers. So just because you and I no longer have a need for a Shaker table video series because we've outgrown it, there's a hundred new guys who find it to be exactly what they need. Of course they won't buy it in a vacuum...some random nobody on the internet with no reputation probably couldn't sell a single one...but Marc is so established and his site is so full of content and so active, people continue to buy.
Marc is probably laughing at all of the speculation here but in the end you have to admit...at least ONE guy figured out how to make it work...which means another guy could do it, too. It takes brains, tons of work, the right personality...plus you have to know what you're talking about. There aren't many humans on the planet that can tick those all off the list, hence the lack of quality video content available in the long format.
If anything ever happens to my job, I would probably enter the market. I have all the makings but no financial motivation with a job that currently pays the bills without working me to death. I still hate it, but it's at least viable. I also don't really wanna ruin my favorite hobby by turning it into a job. But I will if I have to cuz my kids gotta eat.
I'd rather build the one rocker and film it and edit it than build 20 or 30 rockers for the same money. That video will continue to pay dividends in perpetuity...once you sell all the chairs you have to build more if you want to earn more money. Passive income is where it's at. Screw production. That ain't nothin' but work.
I'm guessing this is an exterior door?????
What I would do is lay the door down and do the exterior side with epifanes clear varnish. The interior side of the door, I would do after the exterior side has fully cured and use a water-based topcoat so I won't have to smell that crap inside my house.