I run a business from home, but I don't specify because it's identifying.
Basically I only run it from home because I have a spare room and I'm too stingy to pay for an office. I do everything from home that I'd do from an office except have meetings (I organise them in cafes, which in my sector is fine).
My advice is to write a list of your interests
Take each one and work out what sort of person is spending roughly how much money on it, when, and where.
See if you can add value somewhere, or if you have a new take on it. If you can't/don't - move on.
Consider that being a reseller means you are simply taking slightly less of a cut than the person above you in the food chain - not always an efficient way to work. Your own product always equals more profit.
Never do anything just to cover costs - you need money for contingencies and growth.
Don't try to market anything to "everybody" or "as many people as possible" - find a sector that's specialised and hone your approach there. Obviously don't choose a sector where you can see that people prefer not to spend money, unless you have enough experience of the customer type to want to revolutionise the sector and change that.
Programme in exercise because you really can sit at a desk all day working and realise you've registered twenty steps on the fitbit!