The number of YouTube subscribers required to make a living varies depending on a number of factors, such as the type of content you create, your audience demographics, and your monetization strategy.
YouTube creators can earn money through a variety of methods, including advertising revenue, sponsorships, merchandise sales, and crowdfunding. Advertising revenue is the most common way to monetize a YouTube channel, and it is based on the number of views and clicks on ads served on your videos.
According to YouTube's Partner Program, channels need to have at least 1,000 subscribers and 4,000 watch hours in the past 12 months to be eligible for monetization. However, the amount of money you can earn from advertising revenue will depend on a number of factors, including the type of content you create, the demographics of your audience, and the level of competition in your niche.
As a rough estimate, many YouTube creators suggest that you need at least 1,000 subscribers and 100,000 views per month to make a modest living from advertising revenue alone. However, it is important to note that the amount you can earn from YouTube will vary depending on a number of factors, and it may take time to build a sustainable income from your channel.