<human>: Can you give me the gist of the text in a nutshell?

I'm an experienced traveler, but I've never planned such a long trip before. I was trying to decide between Central America and Europe, but since I won't be working all summer I thought, why not do both? I'm planning to pay for my flights in frequent flier miles, so that's excluded from my budget. (I have tons of miles because I've traveled for work a lot over the past 9 years.)

What I'm hoping to do is fly into Belize or Guatemala, whichever is a better deal, then spend 6 weeks working my way down to Nicaragua. From there, I'd fly to Spain or Portugal, spend 3 weeks or so in those countries, then fly (unless there's a better way?) to Greece or Turkey, spend 3 weeks there, and then go home.

I plan to stay mostly in hostels, do a homestay in Guatemala while participating in a Spanish program for 1-2 weeks, hopefully couchsurf a few times, try to do a 1-2 week WWOOF stint somewhere along the way, and maybe splurge on the occasional hotel room.

Is this itinerary reasonable or would you suggest changes? Can I do it for $5000 (USD)? At 12 weeks, that's an average of $60/day, which I know will probably be lower in Central America and higher in Europe.
<bot>: Is it realistic to spend 6 weeks traveling through Central America, 3 weeks in Spain/Portugal and 3 weeks in Greece/Turkey, and can I do it for $5000?