Slot Machine - can be crafted with 6 redstone, 2 iron blocks and 1 glass block
Slot Machine Cash Out Hopper - spawned in with a command (/give)

Slot Machine once crafted can be used anytime without needing to power it with redstone (this may change in a future update). The server config can be used to change what is used to play and what is won when playing. As well as the multiplier for wins. If you win, items will instantly be accessible to cashout from the win slot and will not let you spin again till you do to prevent stack issues and overwritting.

You can also customize which items and how many items can appear in the slots. By defualt there are 7 possibilites all vanilla mob heads. There is a "namespace" config for both items in and out to add modded items as well. By default its setup for minecraft:diamond but try out some modded items but make sure to adjust the configs as well to make sure its read properly. I honestly havent had the chance to test that myself as Ive been rushed a little lately.

Players can also use a client config to toggle on/off slots spinning sound or another for all sfx from the slot machines like the slot spinning and the win/lose/jackpot sounds.

There are commands for stats "/slotsstats" and "/houseslotsstats" that show per player stats from how much they have played, paid and won as well as jackpot hit amounts. The house stats show total profit, total spins made, total jackpots etc. These can be used by anyone.

Slot Machine Cash Out Hopper is used to cash out profits for RP purposes. For example, the server may have a tax or currency and this could be another way for the city/state/country etc to have a stash of extra valuables lying around. (Mod still needs more work to make it fully RP worthy as even if the profits are in negatives, people can still win from the machine cause its not backed by a "pool" of currency). To use the hopper, you must first place it, then have an single empty chest above it. Can only cash out 1728 at a time from profits based on stack limits and if the chest is not empty from a previous cash out, it will require you to empty it as too not overwrite previous cash outs. There will be a text box that shows the current available balance and another below it to type in the amount to cash out. Id suggest only letting moderators or server owners have access to this item at anytime if its going to be used on a multiplayer server.

This is my 7th minecraft mod. Will appreciate feedback! Again I was a little rushed during this process cause well...life but still leave a comment if you are having issues and I will get to it when I can.

Tonys Slot Machine