I was told I can use an non-lawyer person. Is
It'd be interesting to know who told you that.
No, it's not true.
Generally, a person who is not a lawyer cannot represent another person in court because the unlicensed practice of law is illegal and a judge will shut down that person in a heartbeat in spite of any POA.
There are some exceptions depending on what states your properties are in.
Some small claims rules allow a corporation to have an employee or officer appear for the corporation.
Other states require an attorney to appear for the corporation.
As long as you own properties in other states you'd best be prepared to either hire local attorneys to act for you or travel to appear in court on your own behalf.