Don't know if I should be rating the facility or the experience or the food? It's hard to judge anything that's technically free. Beggars can't be choosers. The entire place runs solely on donations of time, service, and money. The food was delicious and the facility is basic but sufficient to the standards of education.
You are never obliged to pay anything for what you recieve. And what you receive is likely worth a few hundred thousand dollars or more depending on who you are. Like what's a high school degree worth? A lifetime of self worth?
But if I had to pay for this experience as if it were a business that charged a fair price for what it offered, I'd pay about $10-15K minimum and still feel like I got a deal. And that amount is not based on my personal net worth but what I think would be fair market value similar to say a burger at a restaurant be about $5 & $15. Yet it cost me nothing, I left a sizeable donation as someone's generosity from the past paid for me and now someone else can experience what I received.