[husker boxster]

Changing oil is the maintenance item you'll need to do the most, and it's a very easy DIY job. You'll save at least 33% ea time by doing it yourself and this is at least an annual job (based on your mileage est, 2-3X a yr). The #2 item is flushing brake fluid and with a Motive ($150) it's a very inexpensive DIY. Porsche requires brake fluid flushes every 2 yrs, but if you DE, you'll need to do it annually. Brake pads are very easy to change - it takes longer to jack the car up and take the tires off than it takes to change the pads. Air filters on Boxsters are a bit of a PITA to get to, but once again a reasonable DIY.

Depending on your current state of tool ownership, you'll need to invest in a few inexpensive items but they'll easily pay for themselves in the long run. There are plenty of articles and videos on maintenance procedures.