So we head from London early May we need to book flights ASAP. The price for the channell tunnel is 43 euro roughly and time taken (TT) 2hrs. Flight(F)est to London 70€ + Tunnel (Tn) 43 + Petrol (P) to Calais 30€=143€
2.CALIS TO BRUGGE TT 1HR 45M +20€.
3.BRUGGE TO LILLE 1 HR +10 €.
4.LILLE TO RHEIMS- TT 2hrs 20mins +28€
5.RHEIMS TO NANCY- TT 2hrs 40mins +35€
6.NANCY TO STUTTGART- TT 3hrs 30mins +40€
7.STUTTGART TO ZURICH- TT 2hrs 20 mins +30€
8.ZURICH TO MILAN- TT 3hrs 20 mins + 40€
9.MILAN TO NICE- TT 3hrs 30mins + 45€
10.NICE TO MONTPELLIER- TT 3hrs 35 mins + 45€
11.MONTEPELLIER TO PERPIGNAN- TT 1hr 50mins +22€
12.PERPIGNAN TO BARCELONA- TT 2hrs 10mins +30€
13.BARECELONA TO VALENCIA- TT 3hrs 35 mins +45€
14.VALENCIA TO MURCIA- TT 2hrs 40mins + 30€
15.MURICA TO GRANADA- TT 3hrs 30mins + 40€
16.GRANADA TO SEVILLA- TT 3hrs 10mins + 30€
*SUBTOTAL: 70€ FLIGHT TO LONDON + Tunnel 43 + Petrol (P) to Calais 30€=143€ + 20 + 10 + 28 + 35 + 40 + 30 + 40 + 45 + 45 +22 +30 + 45 +30 +40 +30= 633€
*NOTE: This price has been rounded up rather than down, so price may vary substantially. Also the route is debatable just a rough guideline to take in as many countries as possible.
Camping or couchsurfing seems to be the most viable accommodation option. (or sleeping in the car)