We started our business from home and 6 months later rented a shop space. By this time we had proven that we had tested the market to prove the value of our idea. We had customers; We had support staff; We had stock; We had a customer charter; We had suppliers; We had money in the kitty to sustain the business for 3 months.
EUREKA! WE WERE ENTREPRENEURS! Most importantly we had experience and had Gathered moss from the hits and misses.
Starting a business takes a lot of labor of love so it may be wise to have another source of income while you nurture it to grow.