Split rentals
 

As long as the station is happy to assign the vehicle, are there any issues in splitting X days into X number of individual rentals for the PC status renewal?

Many stations have identical rates per day, are willing to provide a solution, and perhaps its not so inconvenient to drop in and sign a new agreement each day if it means the difference of PC for another year or not.

No, but it could be more expensive (or work out cheaper).

I often do this, not to game the qualification system (I'm already close to PC requalification for the year) but because sometimes the most convenient way back from returning a car is to take another car and come back a few days later when I fly out.