Passive income often connotes building something once, then sitting back while money pours in. More often than not, this doesn't happen (at least initially anyway).
Most of your time with your side project will be allocated to customer support and marketing. Others on this thread have correctly pointed out that approaching the project in terms of a business is the appropriate mindset to possess. You'll constantly be tweaking and iterating until you hit product-market fit, then you'll have to go out and sell the product.
It took me about a month to build https://www.onhand.co then double that time to reach enough users to sustain the server costs (still not profitable).
Honestly the best advice I have is similar to the advice startups receive, which is first figure out a pain point others are willing to pay to alleviate, then spend time building your side project/business/passive income.
Most of your time with your side project will be allocated to customer support and marketing. Others on this thread have correctly pointed out that approaching the project in terms of a business is the appropriate mindset to possess. You'll constantly be tweaking and iterating until you hit product-market fit, then you'll have to go out and sell the product.
It took me about a month to build https://www.onhand.co then double that time to reach enough users to sustain the server costs (still not profitable).
Honestly the best advice I have is similar to the advice startups receive, which is first figure out a pain point others are willing to pay to alleviate, then spend time building your side project/business/passive income.