If you don't have a whole lot in funds, a candle business can be mostly done with one person until sales pick up enough to require help making enough of them.
If you like/don't mind marketing you could try the RedBull route and have a beverage company work with you to make some new drink and you'll only have to worry about the business side of it and not deal with production/distribution.
Depending on where you live, a vending business could also be an option, as the biggest costs are at the start, then it's just maintaining supplies, ensuring stock minimums, and doing occasional maintenance on them. You don't even have to start that big; coin-based vending machines are still around (although used a bit less since COVID) and they're usually less than $200/each for a 3-candy unit.
