Dad, there does seem to be something wrong here. I am the PTO pres for 3 years at our school and A) I would not want or need an office in the school, it was hard enough getting a PTO closet in the school anyway.
It is know that although the PTO sponcers events and brings things into the school, the Principal has final say in all that goes on. It does not seem that way in your school. I always tell parents that come to me that I am involved to bring the fun things to the school and to fund raise for those things and the Principal and teachers are there for everything else.
I will say that my youngest child was selected for a spec ed class that he needed, the teacher came to us thinking we would be mad for the suggestion, but he is know in the class, nothing to do with our involment in the school but a parent did go to the superintendent saying we were getting special treatment, go figure.
Anyway, good luck, check the by-laws and check with the business office to see if the office and power are proper and available across the system.