There is little to no need for anyone to scrape the web themselves, CommonCrawl does it for free and provides access to all that data for free, they are a charity similar to The Internet Archive:
As for using that data to train a model, I've done it at my own company and it's not that expensive, certainly not the astronomically expensive figures people seem to think it is. Maybe a hobbyist can't do it for themselves, but my small company managed to get pretty good results training on our existing hardware. It's hard to give concrete figures because we manage our own hardware instead of using AWS, but all in we're talking on the order of 100k, as opposed to what I've heard people on HN think it costs, as if it's a $10 million+ enterprise.