So we want to test some small developed websites on parking for maybe 1 or 2 days a week for several weeks and see if the site can make good PPC revenue while parked.
After changing the DNS to the parking firm we would change it back to its website nameservers after say 24 to 48-hours.
Don't want to keep it on the parked page for too long as we don't want the search engines to classify the page as being parked so it can keep it SEO and Page Rank, and also not damage its traffic.
Is this safe to do and if so what is the maximum frequency or length of time it can be parked before the SEs may classify it as a parked page?