Tower Install?

I purchased a Airboom wakeboard tower from the only boat company in town. The bank that I bought the boat from is letting me refinance the loan to put the tower in so it doesn't cost me another loan payment-cool. They told me they would install it for $432.00(and put it into the refinance to). Me and my old man can install it ourselves for a hell of alot cheaper, weather it would be not-as-good, as-good-as, or even better I don't know. What would you recommend? them or us? There is another welder that my dad worked with that is a professional welder that says he can do it to for maybe cheaper? His work is absolutly awesome from what my dad says. If he does it can he make all the hardware or do I have to order it separate? Any ideas would be greatly helpful. I just don't want to get my ass scrude. Thanks.