This is a good idea. If I was an unscrupulous rig owner, there's a lot of ways to take advantage of the current system to drive up prices. Those super low transaction fee transactions never confirm (1Sochi anyone)?
If rent payment takes too long, rental should be cancelled and funds (with BTC tx fee deducted from them) returned to payer after his payment is confirmed - because it's renter's fault to make a mess with wrong tx ammount or fee - right?
I think a straight forward solution to this problem is to introduce an online wallet on betarigs -> Rigs can only be rented, if there are enough funds in the renters account.
This would solve 2 problems:
1. The renter doesn't have to pay a transaction fee on each rent
2. The rig owner does not have so long "downtimes" since the payment would be instant
Mux, I hope you consider this, it would add a lot of value to betarigs!
Kind Regards