Well the above has finally sparked me into doing what I have wanted to do for several weeks now.
I don't think your machine is working correctly. The picture shows only 2 coins produced.
JK. Nice setup!
Your issues sound somewhat similar to mine. I did the SD card reset. It works, but the machine seems to like me messing around with it less and less, because the "can't browse to machine IP" issue happened again relatively quickly.