It takes a lot of money and work to start up a business. You need building lease, supplies, insurance etc and not everyone who wishes for their own business has this kind of money. If you don’t have a lot of cash to spare there are however many things you can do, like internet marketing. Here there are also tons of ways for you to advertise for free.
Think for yourself what kind of business could you start up for under 100$ answer is simple “none except for internet business”. All you need for this is a computer and a fast internet, if you got these 2 things you are a step closer to get your business up and running. There are many good things with working from home and having an online business. You don’t have to travel or take transport to work, you don’t have to go and buy expensive food in your break and no boss to boss you around.
So if you feel like you want to build your own business I suggest you start with an online business. Seeing a profit will come a lot sooner with an internet business, since the cost to keep the business going is so low.