They definitely start things. Because they are stubborn, they generally finish what they start. Psychological studies show that entrepreneurs share other common traits that are well documented and can be read in the literature. For instance, they generally are first-born and they have had to deal with some sort of adversity in their youth. Real estate agents are always willing to show and to let space to businesses of any size and kind.
Banks make loans to SMEs.
The Small Business Administration and similar state and local groups provide lists of contacts for advice or marketing. Franchisers and others spew out a multitude of advertisements of business opportunities. Even the Web has them coming across the line these days. Governments and trade associations offer trade missions through which you will meet important government officials of other countries. There are also sometimes wage and tax incentives.