I have been playing golf for about 3 years now and I have regressed. I cannot hit my irons at all. I either hit it fat or shank really bad. I have contemplated going to Golf-Tec, or my local golf course to seek a professional. I have also thought about individual teachers and online. Lastly I thought about buying videos. Any thoughts?

Just bought an apartment on the Royal Bendinat Golf course in Mallorca. I want to advertise to reach a potential golfers market.
What would be the best magazines / websites ?

I bought my clubs at Golfsmith. I see they give lessons there. They also give lessons at my local golf course. Which is usually a better place to get lessons, at the golf course or in a golf store like Golf Smith?