What is the amount you are looking to spend to start out?
I had an import biz what grossed 3-5 mill at its peak but my inventory was buying a 40ft shipping container ( or more) and having several warehouses to keep it in. My labor , rent, and bills without a penny on inventory was about 12k per month...
Oversaw 20 mil in monthly revenue for a food chain ( each new location cost 2 mil to build ) and net profit was 10% of an average selling price of 6 dollars so spend 2 mil to make 60 cents a sale IF you do it PERFECT using the worst labor pool society has to offer.
Do you have 100k , 10k , 100 dollars?
If you want free advice on making tons of cash at least be decent enough to explain your situation in full detail.....
What are your skills, your initial investment capital, and what can you burn per month after that without loosing sleep and needing a bottle of Xanax to get from one hour to the next while you light cash on fire getting the biz started. How many hours a week can you spend on this while also working a full-time job to keep new cash coming into this new venture? Do you have rich friends or family to invest without cutting your throat on equity shares?
These are all important things to tell strangers on the internet you want million dollar advice from.
Millions in profit means thousands and thousands of dollars in start-up capital ten times out of nine, unless you buy e-books from Youtube gurus saying you can make a trillion dollars selling thrift store widgets on Etsy or whatever the f^&% the shill that day.