A lot of times the insurance company is the one that pays for the cleanup.
Getting the water out of the house/building is only a part of the issue, you also have removing sheetrock/wood that is saturated besides the carpet if there is sewage in the house/building instead of just plain water. Then you have the driers/dehumidifiers with taking temperature and humidity readings so many times per hour according to the protocol set by the Insurance Adjusters and the company that provides the training for this type of work. If the readings are not done and the process is not followed then they are not legally obligated to pay you for your time and materials.
I have looked into this type of training but without the equipment to do this the way that the insurance adjusters want it done (probably 10k to 25k worth of equipment to do a few houses at a time) I have not looked further into doing this training. Maybe next year as that is a good amount of capital to buy equipment to use only on occasion and if you can get the work through the insurance adjusters as they have companies already lined up to do that kind of work, have the trucks full of equipment and experience.
I am not saying it is impossible to get some of the work but I would get the training first when they offer it so you do the right thing and know about taking the readings, know what and where to look for the mold/mildew and what procedures you have to follow in each case.
There might be opportunities to just pump out the water and clean the inside of the house/building but most of the companies like More Floods, Servpro, and Service Master usually do the whole job since they have all the equipment there with them in the trucks.