I'm going on a trip through Europe this summer and will need approximately 500mb of data every day for about 28 days. I won't need any minutes or texts, just Data. I will need normal/fast speed, so no limitations on that after a certian amount of mb. Options I've considered are:

* Droam
* 1 prepaid sim card per country

But both seem a bit over my budget. What would be the best option in my case?