Yes you can use both PayPal and another gateway at the same time to allow your customer to choose which payment gateway they would like to pay with.
Please check the relevant payment provider on any charges they charge. We do not have any control over there payment fees.
We do not handle your cash. All cash is sent directly to your payment gateway. Please see your payment gateway provider on how long it takes before they payout your funds.
Please get in contact with the team, we will see what we can do as we have systems in place to integrate further payment gateways.
Sorry the Ploxel fees does not include the payment gateway fees.