Hi Guys,
I'm new here. I'll be honest with you, I do not believe that the earth is a disc in space. I have read about a kid that strapped a camera to a weather balloon and took pictures from the "edge" of space. It really doesn't seem that difficult. Also the required equipment is not that expensive, in fact some might argue that using a high end camera might have a wide angle lens that would distort the flatness of the earth and so on. I've seen weather balloons with parachuttes that climb to over 25km for under $150. You would need a camera to take a picture every minute or so, and also you will need very good thermoinsulation and something warm like handwarmers because at that altitude the temperature is quite low and the equipment could be dammaged.

I really don't understand why you wouldn't do that, are you affraid you will clearly see that the earth is round? From that altitude you'll get a glimpse of the curvature, you won't see spectacullar round earth views but it would be something. If you're right then... you will have more proof for your studies