You can start your own mobile restaurant hood & screen cleaning service business. Many restaurants, bakeries, food stores, markets, etc… have stainless steel hoods and screens that collect and trap the grease, and need to be cleaned on a regular basis. Once you get an account, you can get new customers and grow your regular customer base. With regular intervals of cleaning required, to get them working again to their best ability and cleanliness.
Most of the hoods are over services like hot fryers, grills, ovens and stoves. The screens are usually the kind you can take out, and either take to a car wash or use a high pressure washer to clean the screens right on the spot so you can get the job done faster. This service is a service almost all fast food and other types of food stores need on a continual basis. You could make up a flier and drop one off at every place you know that has a hood system inside.
You would need basis cleaning supplies like grease cleaner, and rags to clean the hood areas that suck up to the screens usually. The screens with grease will be the dirtiestread more, but those are usually removable and you take them to be steam cleaned.
If you had a trailer with a steam machine right one the trailer, you could clean them right on the spot. For just starting out, and to save you money in the beginning, you can use a self-service car wash, with high pressure and hot water, for the same effect until you can purchase your own high-pressure washer for.
You should take advantage of all the Free classified websites that let you put Free ads up, you can simply copy one ad, and post it over and over into other similar websites you can find. You should have some magnetic vehicle signs made up to put on your ride, so others can easily find you also.