I mean, I am gonna say 0, because really and truely, while a seasoned SEO could start a blog and make money with no tools
You are at such a disadvantage without them, and if you are knew, you barely understand how much it matters.
SEOs might tell people that they dont need tools but most of them already have the experience to find the right keywords
Without tools, im highly sure 99.9% of new people will end up writing on topics impossible for them to rank
on a new site, never get traction, then quit.
Tell you what, this is what I did when I first started SEO and didnt have money to pay for the expensive stuff month after month.
Learned how to use a tool for youtube, like really learn, so the moment you get on the tool, you already know what buttons to touch.
Then from the moment you buy the tool for one month, do reasearch for your whole niche and extract excel file after excel file of data
for your niche, and keywords, so that once you lose the tool after 1 month, you have so much data you dont need to buy it again.
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if you can do that, and build a good blog, then the profit is still something you cant estimate.
Most people will make 0$ the first few months of a blog because it needs time to rank.
How much can I achieve average blog profits without seo paid tools?