So here’s the scoop…
The amount the CR government looks at as far fulfilling pensionado requirements is the gross Social Security, before the Medicare payment is taken out. So you should be fine.
I wanted to let you know about a great resource as you get closer to filing for residence. The law firm of Petersen and Philps, located in San Jose, specialize in helping expats with matters of residence, buying property, etc. They speak at IL events.
http://www.plawcr.com