I think this is a good post and good advice. Only step 1 is always the hardest step to take.
Name a evergreen niche, yes Weight Loss, Groceries, Discounts, Sports, Save money all those niches are evergreen. But especcially when you are not targetting English audience, the market will be already full of people who thought the same. For example I know a lot about weight gaining, losing, fitness, sports, food and nutrition on a healthy base. But if I would make a website and will create great content, say at least 10.000 - 15.000 words and will take SEO in my head with writing and setting up the website I see a huge amount of competitors in my market. The AAA, AA, A, BBB, BB, B domains are mostly taken, maybe you can hunt on some average domainname. So that is you 1-0 behind and a lot of competition. Making money will only happen if you can reach page 1 or maybe page 2 from Google. It may only happen if you get enough social visitors through communities.
I like how you explain this, but the idea of just thinking about an evergreen niche is too easy. Mostly the balance between profitable niche and competiton is way too much in favor of competiition and that ruins the profitabilty factor. Just my two cents, curious to know your idea about this.