Just spoke to Sixt about my upcoming 9-day rental at MIA. Well, they are asking for my 9-day car rental period either 7$/day for a SunPass (i.e. 63 extra dollars) or 10$/day extra for each day (i.e. 90 extra dollars) if I don't opt for the Sun Pass but I end up using non-cash toll roads (i.e. unserviced by attendants) at least once.
As I drive towards and from the Florida Keys, what would be the best recommendation for how to drive my rental from/to MIA and what to buy/not to buy from Sixt?
Using SR 836, SR 826, and US 1 would be a big headache or would work just fine and won't make me also pay highway tolls of anykind? Locals or frequent Keys travellers, please advice.
Thanks!