Arduino Mega + Ethernet W5100 Shield | Receiving GET and POST | Freezes or hangs

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I prefer to not share it in public, if you know what I mean.

No, we don't know what you mean.

And who do you think you might share it with "privately"?

Might that be somebody who will enter in some non-disclosure contract and most reasonably charge you $200 an hour to look at your stuff? I believe there is a forum around here for that sort of arrangement.

Or might that be some well-known pirate in Mauretania who happily participate privately and solve all your problems for free, and then hijack your project and/or tell the world about it afterwards?

I might also point out that the problem might be simple, but with all those sensors, LEDs and God knows what all else involved, you may need the assistance of several people, so be prepared to pay up seriously.