Your problem is twofold. Chances are you don't qualify for disability insurance if you work part time. I don't know of a company that makes it available unless you work more than 30 hours per week. Being self-employed makes it even more difficult to get.
Disability insurance is, under the best of circumstances, expensive to buy on an individual basis.
The reason is that statistics show that almost everyone will suffer a disabling injury of some type before they're 65 years old. A couple of years ago, many companies got out of the individual disability field completely. If you would like to find out if you can even qualify for a policy, contact an agent who is a broker or look for a brokerage firm that carries more than one company. They should be able to give you more than one quote. Home Brew Fabric Softener 2c baking soda 2c white vinegar 4c water Mix ingredients and store in a plastic or glass container in your laundry area.