Hi Jerry,
Great question. For those not drawing Social Security or a pension, there are a couple of options as far as residency.
Rentista is a category for people with $2,500 a month in non-job income, so dividends would count there. You can also make a deposit of $60,000 in a Costa Rican bank to qualify for this category.
Inversionista requires an investment of $200,000 or more in a business or commercial or residential property, which could be your home.
For specific questions on your case and qualification status I would suggest you contact a Costa Rican attorney who works with expats to get residency. Roger Petersen is a frequent speaker at IL events and is very experienced in these matters: http://www.plawcr.com