Good machining costs money. As does dyno time especially when you don't own one. However, you should be able to achieve your goals without dropping $9K, even with Mike building it. Ask him to do something lower budget than his "550hp recipe" deal. There are many decent shops, and probably something closer, and plenty of decent "power recipes" around. You should be able to get something under $6K with decent parts in it.
In regard to the other link - I'm not familiar with the site but the posts lead me to believe they have their heads up their asses. A little knowledge is a bad thing...