Your car gets hot because glass is a terrible insulator. Ceramic tinting isn't just about looking like a limo; it blocks the infrared light that actually cooks your interior. You usually see the best deals in late spring when shops are ramping up for summer but haven't hit their peak rush yet.
A professional job costs around $600, which is a lot to drop at once for a comfort upgrade. We can split that cost into smaller pieces. You want to negotiate the price of the film and labor separately from how you pay for it.
The 18-month window is a hard deadline, not a gift. If you still have a balance after those 18 months, the standard interest rate kicks in on whatever is left. Pay the $33.33 every month to make sure you finish on time.