Volunteer Teacher in Costa Rica

Hey guys,
My family and I are going on vacation to Costa Rica for two weeks at the end of December. I have already decided two weeks is not enough so I've found a volunteer agency to work with for eight weeks, beginning immediatly after our vacation. I will be teaching English in an underdeveloped part of Costa Rica, which is undetermined at this point.

The program will cost me a total of 2500 dollars, and though VISA has been kind enough to loan me the money for the time being, I don't want to spend the next few months paying for the VISA staffs bar tab with the amount of interest I will owe them. So I'm taking full advantage of this online fundraising website Global Volunteer Network has provided me with.

I was recommended by the GVN to set up a reward system based on the amount you donate. So I have decided that if you donate $10 or more I will take a personal photograph for you in Costa Rica. The photo can be a request: a photograph of the landscape, the rain forest, anything you want really. It would be really cool if those who donate ten or more dollars ask for photographs of exotic animals. that way my trip can also become like a real life Pkemon Snap. 

$20 or more and not only will I take a personal photograph for you, but I will also write and record a personalized guitar song for you.

$50 or more and I will take you out to a dinner and  moive.... Seeing as I'm trying to save up as much money as possible, the dinner may end up being at McDonald's

That being said I appreciate any amount of money you can donate. I wish you guys all the best, and thanks for taking the time to read about my project