My advice is similar...get out of Costa Rica! I would head to Nicaragua. Nicaragua is awesome, less touristy, culturuarlly much more interesting, far cheaper, and actually (contrary to wht many people think) the safest country in Latin America--and a lot safer than CR. Check out Granada and Ometepe (volcano on Lake Nicaragua) and San Juan del Sur on the west coast. The Moon guides is actually really good.
You can get there cheaply by bus going through Liberia, or you can fly Taca for about $170 RT this time of year.
Just my two cents.