Cost of living Escazu area ??

No tax is due here from earnings elsewhere.
$3-5K a month should get you some very nice accommodations, but the exact locale will determine it...and Escazu is a more expensive area to live in, however wonder why you would want a $70K vehicle...? Flaunting your wealth, will certainly make a a potential target.
Are you intending to apply for Residency? You would have to contact a private healthcare provider for additional premium info.

Thank you. I understand, don't want to be a target so not interested in flaunting wealth, have been to CR, spent some time with wife on Pacific coast Tamarindo, Manuel Antonio, and spent a couple of days in Arenal this past year. We were touristy for my wife's first visit, she loved the country. Met some folks that had a Mitsubishi Montero and paid 80k for it in CR stateside that's about 40k vehicle. We want an SUV type to explore CR, Believe me, I need to stretch my retirement $$$. but want to live well in a safe area. Yes, the plan is to apply for residency, rent for a year make sure we want to stay in CR an learn about other areas before we consider buying. Appreciate any guidance/ suggestions. Jose

Living around Escazu  is very different from vacationing in the other areas you mention. Before deciding on living there, suggest you visit for at least a week or two before making any decision.