Adjustments to field?

We have space available for the field, but only a 9’ ceiling. Is this workable? I saw the Use Common Sense rule, and also the requirement to set the virtual ceiling to 10’ or below with software, but wanted to make sure we were going to be able to do everything we needed to do before jumping into the program. Would we be ok to set the virtual ceiling at 8’? What problems might we run into? And also, is carpet ok or do we need a hard surface floor?