Capitan: If you are planning on living here and doing it legally, you have to apply for residency. The easier route is applying at 'rentista' status and putting $60,000 into a Costa Rica bank account. Otherwise, you will have to exit the country every 90 days for 72 hours. Of course, being legal, you'll be able to work legally. If you plan on retiring, you can apply as a pensionado and you have to show $600 per month I believe from Social security or penion from your home country. You may want to visit:
www.therealcostarica.com or
www.arcr.net for more detailed information for the residency requirements if interested. I just became legal last year myself. Good luck!
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Blue Water Properties of C.R
www.bwpcr.com