He would not be paying someone $3000 just to run a tool. Knowledge and time are difficult things to assign monetary value to.
You don't have to be a rocket scientist to figure out that to transfer a website the size of Yesterday's Airlines to a new platform at minimal costs (manual copy-pasting everything) is going to be a task so monumental that it won't be worth it. A powerful tool, and people with expertise on the matter are needed to do it efficiently. Something tells me those things aren't cheap. You know what, this is the same thing Richard explained in the article

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Richard's response was harsh, but again, in the article, he explained how he had been looking for a solution for weeks and all the obstacles he had encountered. So you can't blame him for being annoyed at a comment like yours.
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We all know Richard can be an arse at times, but that doesn't take away from all the useful info on the hobby that Yesterday's Airlines holds. I personally think it is in the best interest of the community to keep Yesterday's Airlines alive. Even Richard's archenemies in the hobby have been caught complimenting the bulk of his work.
The math says that it will take about 50 collectors to donate the amount that they would spend on a narrowbody 1:400 model to help Richard cover the bulk of the cost of keeping the site alive.
People donate money for all kinds of things. In many cases, the money goes to some big organization, and nobody sees it again (well, I guess the president of the organization and those close to him might see it). As far as I am concerned, Richard can end up paying 1/2 of the cost and pocket the other £1500 to go on a cruise with his wife. Don't many content creators - of varying quality - make a living out of money that people throw at them via Patreon anyway?
This is the first time I've seen Richard actively asking for donations in more than 10 years, and after having put a massive amount of good quality content for our community. To me, he's also presented a good case for it.