I think PayPal have one in us but soon to come here for iphones. Forget remote pdq, unless you want a rather large device on your hip, which you'll have to insure on your home insurance. Merchant banks also have minimum charge of say £10 per month, if you don't go over that in charges that's the charge. Also remember no matter how professional and honest you may be there will still be many who won't want to give you their card due to fraud. Also the PayPal one like 'Square up' is only a dongle swipe attachment to your phone and people may be suspicious tbh, although its the cheapest and easiest solution.