There's a wealth of knowledge on this site, do some solid research or speak with a reputable tuner to get recommendations. People on this site are not likely to help you with mods they consider dodgy, which means you're looking at over $1000 for a good tune to get more boost.

A boost gauge is simple and cheap to install if you don't care if your engine goes bang though.

Also offering a couple of cases of beer might be more effective than money, don't ask me why I do not know. However ask again, after doing some research and making a few posts, ask a few questions and get to know people first.

For the coilovers google diy garage, they can help you install your coil overs yourself, my cousin tried it.