Alright so in order to make 30-50k a day... here is what you need to do.
Affiliate marketing. Affiliate marketing is when you sell someone else's product and get a commission.
There are thousands of websites making this money. Although it's very difficult to do so. If you elect Amazon Associates as your main affiliate network, you'll probably have to bring in millions of viewers a day to make goal.
So let's go down that path for a moment. In order to make 50k a day with Amazon Associates at 4% commission (sounds about average), we'll have to sell $1,250,000 worth of products a day. By selling I mean your users has to click on your link and then purchase.
So let's say you target some higher end products at $1000 @ 4% commission. That means 1250 of your users has to convert. If we're looking at lets say 1% conversion, we'll need about 125,000 users per day to your site.
Alright so now let's talk about how to bring in that kind of traffic.
We'll probably need a generic product review site. This way we can expand our product review among many verticals.
So, we need to hit the first page of Google. You know what they say..... If you want to hide a body, hide it in the 2nd page of Google.
In order to rank on the first page of Google, we'll need links and a really good article. When I say good article, I mean you really have to put your back into this thing. What I mean by that is you have to understand every facet of the product and explain it to someone who doesn't. No keyword mashing or hashing product descriptions...... get with the times or Google in this case.
The best approach and the longest approach and the approach that most people won't do is to actually buy the products yourself. "What!? I'll lose money?" No, because you're going to order them on Amazon and return them after you're done. When you do this, you'll have crazy good photos and provide insight most are unwilling to provide.
Next, we'll need some links. You can go with your every day trash PBN links or you can go the Wolf-of-The-Wall-Street route. You gotta go god damn sell yourself. Imagine that, an affiliate marketer having to market. I know, it's tough.
Anyways, the one most important thing you have to remember about getting links is that everybody is after clout. You know what that means? It means people don't give a shit about you unless they have something to gain. So give it to them. Say you're on the front page of Google, say you've got influencer connection, w.e the fuck it takes.
Repeat this product with simple tools like Google Console to check where you're at. If you're not ranking, you got nothing, zilch.