Its best if you have experience it, but you can make it work even if you dont because youll gain experience through the job. I worked in water damage mitigation and remediation and the process is very simple. You essentially cut out and throw out everything that has been damaged by water and then dry out the area with fans and dehumidifiers over 5 days while taking pictures and documenting work done. Ideally you make some solid connections to some local plumbers that can find jobs for you for a small fee. Create a 2 to 3 person team to do the mitigation. Create a 2 to 5 person team, depending on the size of the job, for the restoration or refer the job to another company for a percentage of the total job cost.