Is very possible starting up a business without capital all you need is your ability of pursuing success.
Affiliate marketing is a business you can venture into without capital and still make good money from it, even more than some businesses started with capital.
Affiliate marketing is the process by which a person earns a commission for marketing another person's products.
All you need to start this business is good communication skill in other to sell the product of the other person and get a commission for doing that.
You can decide to market product of different company or person's at same time by doing this you are sure that everyday someone will buy from one of those product's there by making money every day.
When you become an expert in affiliate marketing you will start making profit every day of your life.
I will not say that it is impossible to earn money from it, it is possible but it is a time-consuming and laborious and long time procedure.
Suppose you are a bachelor and have no household responsibilities. In that case, you can do it as a part-time job, which is not very suitable for a person who has to run a house and support a family because there is no guarantee that your product will sell or it depends on your marketing, getting customers is not that easy.
No matter how good a marketer you are, it is not possible to get customers every day. So if any person wants to do this work to run their home then my answer will be no.