Originally Posted by
tsveti.marinova
In fact when I was travelling for my summer holiday in Bulgaria, I have chosen to go with a flight. I bought a cheap flight to Sofia, Bulgaria, then I rent a car by a company in there, I think the name was Veger Rent a Car
http://www.vegercar.com/en - the prices were very low- I find this way of travelling much more reasonable, i saved a lot of money and also had a car during my whole holiday in Sunny beach.

This should be the best advice with all LCCs. Think about all the tolls and fuel one will need to pay for that long of a trip. Sixt in Germany does not allow cars to be taken to the Balkans, Romania, Bulgaria and one will certainly void any insurance that comes automatically with the rental in Germany...it's a gamble that might cost the renter more than he/she is willing to pay...