Car and trailer query

We have just bought a very small sailing dingy with a towing trailer which we plan to take down to our Spanish house and leave there. We are also planning to buy a car to tow it and leave that there too. We visit the house a few times each year and are not Spanish residents. So - will we need to re register the car in Spain - I guess yes, and if so how quickly does that need to be done? Also will we need to register the trailer (under 750kgs) - again I guess so! Anyone done this? How do we do it and roughly how much will it cost? The car we are planning on buying will be worth about £1500 and the trailer is quite old - don't know anything about it as yet, except it works!

How are you thinking of towing the car? This page by the Trafico may help:

Mark

I recommend that you buy a Spanish Registered car in Spain because if you bring a car into Spain from another EU country then as well as having it transferred / registered onto Spanish plates you will have to pay some import duty ( not sure how much ) also will the car you are planning on transporting to Spain be a left or right hand drive. If it is a right hand drive it can be a pain driving on right hand side of road after a while. 

Regards

 Ken