Rental Cars — Rental cars aren’t cheap in Cabo. Travelocity.com seems to sometimes have good rates on compact cars in Cabo. Be sure to pay for the car with a credit card that covers collision damage and skip getting the expensive collision insurance through the rental car agency.
Beware that your reservation will be in dollars, but your contract will be in pesos; they’ll probably make $$ from the self-applied conversion rate, so best to be aware of this.
Airport Shuttle — $16 each way, per person. It takes a little longer than catching a cab, but the free cervezas on the way will make the time go quicker. To return to the airport, see the concierge the day prior and they’ll make sure you’re set for a pickup. For not much more, you can also book with TransPacifico and have a Suburban all to yourself.
Airport Limo — TransPacifico offers upscale transportation for US$95 from the airport to downtown Cabo San Lucas (up to seven people in a late-model, clean Suburban). This doesn’t cost much more than a taxi, so it’s a great deal, even for a family of four. This is the real deal — a nicely dressed chauffeur holding up a sign with your name on it at the airport, waiting to whisk you away — just a great way to start off your vacation. As a bonus, TransPacifico will head to Cabo on the toll road, saving about 15 minutes of travel time. To book with TransPacifico, click here.
Taxis — the $300 you’ll spend on a small rental car will sure buy a lot of taxi rides. For those trips to Todos Santos, see the concierge and just rent a car for a day (or take a TransCabo tour for $50 each). Yeah, it’s a pain paying $10 each way to go to Costco, but $300 will buy a lot of those $10 trips and with a lot more convenience (like being dropped at a restaurant rather than spending 20 minutes searching for a parking space). What do we do? We keep a car in Cabo and know some great parking spots downtown 
Otherwise, we tend to walk the fifteen minutes to downtown in an effort offset the caloric consumption at dinner. By the way, no tip required for taxis (it’s built into the price).
Cheaper Rental Cars and Travel — when you travel internationally, try booking your rental car in the country you’ll be traveling to. For example, rather than booking at www.avis.com (the USA website), try www.avis.com.mx (the Mexican website). Also, the major travel booking engines (Expedia, etc.) have foreign variants where you can also try. If you don’t have any luck, try contacting a foreign travel agent and they can usually secure “locals” pricing (and at the same time, charge it to your USA credit card — which the websites may reject due to it be domiciled in the USA rather than in the country where you’re trying to book).
Cheaper (yet) Rental Cars — just prior to your trip, take another look at what rental cars are renting for. Since there’s no penalty for canceling a rental car reservation, it doesn’t hurt to check and see if the rate has changed. Often, if reservations are on the light side, you’ll find car rentals discounted the closer you get to your departure date.
Policia — Speaking of rental cars, you need to know that you may get pulled over for a traffic infraction. The most common is turning the wrong-way onto one of Cabo’s many one-way streets. The local cops sit and wait for some unsuspecting Gringo to do this. We’ve never, ever been hassled, but a buddy got stopped and paid the 200 peso “fine” immediately to the officer. Just be cool, mind your manners, and you won’t be paying any fines to anyone.
Emergency — Speaking of rental cars and speaking of Policia, it’s worth mentioning that 911 won’t get you ANYWHERE in Cabo. In the event of an emergency, 066 is the number to use! If you’re at Villa La Estancia, call the operator (0) first. Worse comes to worst, there’s a emergency clinic on the four-lane when it first enters Cabo. The official hospital is located across from CCC on the road to Todos Santos.
Colectivo Buses (public transportation) — These are small white buses that run around just about every street in Cabo. How’s your spanish?
