Just to clarify the $0 Tech Inspection comment.
If you take your car to a DE Approved Tech Inspection Centre for your regular maintenance (and that includes Porsche Dealers), then they will usually take care of the Tech Inspection at no charge. This is however at the discretion of the business and by no means should be expected. A proper DE Inspection takes time and for these businesses, time is money. Don’t expect to show up for the first time at a DE Tech Centre and get your inspection for free.