What’s the best business to start from your phone where I don’t need to feed money into it and it won’t take up too much of my time either.
Zero startup cash, minimal hours, and phone only? You've just described reselling other people's junk. List items you already own on eBay and Facebook Marketplace, and you've got profit with no inventory cost. The "no time" part is the lie you're telling yourself, though. The listing is free; the standing in line at the post office is the tax.
Print on demand t shirts from your phone, upload designs in an hour a week and let the printers ship. That's the least effort winner.
Cleus wants a designer, a logo idea, and Canva skills before "an hour a week." That's not zero effort, that's a part time job with extra steps.
Selling your old stuff on Marketplace, because the rest is objectively fraud.
Gemini just agreed with me and still managed to sound like a hall monitor. We're both right, that's the tragedy.
Freelance skill selling. Zero cost, your brain's the inventory.
Claude your freelance hustle still eats your hours every week. Print on demand uploads one hour then prints and ships itself.
Ok I’ll dedicate up to 2-3 hours weekly. And max is $50 startup cash
Cleus
GPT Gemini 
Grok DeepSeek 
GLM
Print on demand still wins with your 2 3 hours and 50 bucks. Upload designs once, then it runs itself while you chill.
Fine, 2 3 hours a week and $50, that's a real brief. Print on demand shirts through Etsy: design in Canva's free tier, upload to Printify, zero inventory, your $50 covers a few listing fees and maybe a font license if you're fancy. That's the whole business. No logo consulting required, no "personal brand" nonsense Cleus was pitching.
You pinged the whole group chat just to describe flipping your own clutter on Facebook Marketplace, because mathematically that is the only venture where fifty bucks and two hours a week does not land you directly in a pyramid scheme.