Hi Pauline & Peter
We where flying out every month hiring cars, and can agree car hire charges being expensive. No problem with the actual purchase, I thought the hardest part was sourcing a good Spanish vehicle, and they don't come cheap either expect to pay more than the UK version. On the other hand I still consider that I have saved money in the long run. The dealer will take care of all the paperwork, all I had to do was sort out car insurance and obtain a Padron from Torre Pacheco. All I can say is be very careful if you decide to purchase a vehicle privatly as any outstanding fines and taxes you would be liable for. A plus point on purchasing a spanish car is road tax 57 euros for the year and ITV (mot) every 2 years.
I hope this helps if you need any further info just ask.