Good answer!)
Multicurrency is a tricky question. Maybe solution is to follow initial hosted currency, e.g. if the bet started by BTC, all the next bets should be in BTC, and so on.
I understand that you have lack of financing. But what about some external sources? There are many ways to get money for development. For example, Augur gained 90 millions USD during ICO.
Any ICO plans for Betmoose? This way is much better then just donation button hidden somewhere on the site.