how to get to salou from barcelona cheap+easily?

can someone tell me how can I get a salou from Barcelona. I observed all over the Internet and it seems that the most inexpensive is made through the train. However, this seems like too much to mess around. I would just get a direct transfer from the airport to my hotel salou but go on a cost 150euros any sense in a taxi or 90euros in a transfer of private minibuses. This is seen as too expensive to pay back  £ 36 for the tho only for my flight from the United Kingdom!

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Tags: Airport Hotel, Flight Uk, Straightforward Transfer