What has the last 20 years got to do with it. My sons have done so.
I live in El Paso and there are several businesses who do that kind of business. There are also 2 sisters who borrowed the money to buy a long wheelbase van which they converted into a pet grooming mobile service. It wasn't long before they split the business and now they each have a van and use helpers.
Summer jobs mostly and working as helper for self employed plumbers, electricians, remodelers etc. (A little research will reveal that there are lots of self employed who work on weekends) It got them through college.
Well, J. Clarke, if you're convinced it can't be done, it can't be done. Plain as that. Here's a few suggestions. Go to a community college to get the basic courses (English, Government, Sociology, Math, etc) out of the way. It's cheaper at the CCs and the credits can be tranferred. The CCs have plenty of evening and weekend schedules. Once you're thru the basics, apply for financial help to pay for the tuition and books at a regular college/university. Keep in mind that you may have to attend evenings and weekends in order to hold down a full time job. It might take a little longer that way but where do you want to go? I should mention that there has to be a certain amount of desire to accomplish these things. Do you do woodworking. Can you build a few things to make some money, Adirondack chairs, picnic tables, cabinets, . I turn away lots of work because it's just a hobby with me but the demand seems to be there. If you're talking about your kids, can you teach them some skills? I know a guy who builds model trains out of wood and sells them for $300.
Max