At home, checked the numbers, assuming a 1:1 win-loss rate, 46875 total equipment is sustainable with no average gold gain or loss over extended period of time.
How does it work?
Chance to get x1: 51.5625%
Chance to get x2: 25%
Chance to get x3: 12.5%
Chance to get x4: 6.25%
Chance to get x5: 4.6875%
Average Multiplier: 1.875
this means you get 93.75 gold per tick, which will sustain 46875 gold worth of equipment. If someone could check my math on that, I'd appreciate it. I had to redo the average win-rate because my original numbers were slightly off. I suspect they might still be slightly off, but I've had a very long day and my brain is fried.
::Edit:: asked an old friend who is a math professor, and my numbers are off. Ballpark guess its close, but its a bit more complicated than I originally thought. Perhaps an easier way of going about finding out the average multiplier is by asking a dev to check their recorded numbers. The average multiplier is going to be dependent on the number of rounds played.