As a Realtor in Woodside and PV, I agree with all of the helpful suggestions of my colleagues.
In addition, the opportunity to find vacant land is greater in Woodside vs. PV. However, the price per sqft is greatest at the flatland and less expensive along Skyline.
Please remember that if you are financing, the Lender environment is such that institutional lenders are very shy in providing financing and you may need to look toward hard money lending. However, if you purchase land with a structure, the opportunity to obtain institutional financing increases tremdendously.