Counting only the Wine numbers: The downloads from Sourceforge average out 52k / week. At an average of 20 megabytes per download that's ~4 terabytes / month. It's a lot, but nothing out of the ordinary (about $20 / month on DigitalOcean, for example).
Roughly 7k requests a day is something a cheap server can fairly easily handle.
I fully support this move and will gladly donate to help the server costs.
J. Leclanche