Honesty one of the biggest challenges is finding work/life balance. Most of us work long hours, and then I have another 12-15 hours a week that goes into the business after work and on weekends.
If you can limit your working hours, to about 9 hours a day, you will feel like you still have a life. I used to do 10 hour days, and it sent me into absolute burnout after 4 years. Scaling back the hours was the best choice for me( I also have my own 2 kids, so you need to have time/energy available for them after work too)
The next issue is getting parents to follow the contract. I always find they push the limits on illness policies, and picking up their kids on time.
The last one, is getting parents of children with developmental delays to acknowledge that their child may have concerns, and seeking out the appropriate resources to get the child some assistance.
It’s not an easy job, so kudos for showing interest. Good luck!