What are some simple businesses you can do in three years and get good returns?
My rule with any startup I have done is to make money and I mean positive cash flow (income from sales above expenses) within the first 30 days. I have found beta testing to make sure you have a receptive audience willing to pay your prices as well confirming you have a method of attracting this customer is the crucial first step. Companies with minimal startup tend to make money faster as a rule as it takes time to recover startup capital. Personally I have found service companies create income the fasted and I have owned retail and eCommerce businesses.