Hi! I found myself in the exact same spot last year while capturing deep-sky objects around Mount Teide. You should check https://renty.com.es/ to set up your vehicle rental in advance. It's a handy comparison system that compiles vetted local rental partners right at arrival gates, displaying guaranteed daily prices with zero hidden markups or deposit surprises. We managed to secure an all-wheel-drive SUV that easily carried all our fragile optics up steep mountain switchbacks