hello these things happen.
Yes yun is quite expensive still atm.
And I dont understand the type of coding needed to comunicate with such modules.
It would be great to see freetronics to be the first the have a low cost plug and play wireless uploading shield or module.
This would be great for the DMD display as most displays are out of reach if permanently mounted.
Plus tweaking of code is possible if your Arduino board is hard to get at a needs some disassembly to reload like my message matrix clocks.
Lol be the first freetronics