Here's the link from Inc Magazine where I got these figures.
http://www.inc.com/encyclopedia/minority-owned-businesses.html
Things like baby sitting and auto repairs may or may not be included. Those that did report would be included in the personal services category. Be it sole proprietorship or incorporated, large or small, the demographics show a disparity. The black owned businesses are self supporting and do not support additional employees. Asian and Hispanic businesses have an overwhelmingly larger number that support employees. Of the revenue generated by black-owned retail businesses, 54% was from businesses in the industry classified as motor vehicle and parts dealers. Hispanic businesses were more diversified.
"... but many, 29 percent, operated in construction and other services, such as personal services, and repair and maintenance. In fact, Hispanic-owned businesses owned 8.5 percent of all such businesses in the U.S. Retail and wholesale trade accounted for 35.9 percent of Hispanic-owned business revenue. Again, as with the African-American-owned businesses, a large part of the retail trade revenue (80 percent) was concentrated in the automobile industry, and motor vehicle and parts dealers."
Here we see similar services but more of the businesses did support additional employees. A look at Asian businesses shows this.
"The number of Asian-owned businesses with paid employees also grew, 11.3 percent, a rate more than twice that of the national average for all businesses with paid employees (4.3 percent)...The single industrial area in which the greatest number of Asian-owned businesses operate is wholesale trade. Retail trade and the services also rank high in terms of areas of concentration for Asian-owned firms."
You can look at this as stereotype if you want but it is what it is. Asians and blacks don't cut lawns. Asians aren't going to remodel your bathroom or get a used starter for your car. If you want to buy umbrellas for a dollar and sell them for 10, you better learn another language.