That's a good one but honestly I can't really tell what payment option would really be of help in this your line of business but I can suggest at this point you make use of multi payments system that would really catch up with lot of customers that would come around , that way you can amount to a very massive audience. And again if you're seeking solution that is legal in the EU, then you should look out for this, if there are no restrictions to sone payments options inorder to ease your business and transactions.