Each person who dreams of starting a business has to think about the space that they have available to them and how they are going to make that space work for them. Some people will have a lot of room for starting a business, and others will have to choose business ideas for small spaces and use them to make a business work for them. There are ways that a person can run a business without using a lot of space.
A person who works on their computer in order to keep their business going may not need a lot of space in order to run their business. A person who operates their business solely online will find that they can do that in a small space. The one who would like to start a business in a small space has to find the business idea that works out the best for them.