I can tell you from experience. You definitely can’t, but I can start and run an online e-commerce business by myself to give you a shoestring budget.
So that being said, if using Shopify for ecommerce, Adobe for creative, paying for your domain name with Namecheap, and registering your business with your local government, it costs me about $220/mo to run an ecomm business by myself.
Realistically, you could use open source replacements for Adobe products too, but I like their stock imagery as well. Take that out, and you’re at about $120/mo plus processing fees for each transaction.
If you don’t need an e-commerce site, you can use something like light speed for a free website. Even WordPress. Add free social media for a boost.
So now this means you’re down to only $20/mo if not using an e-commerce site.
You can learn everything you need to run these sites between dev docs, support articles, forums, blogs, and YouTube videos. All free.