Quote: "Now you have the drifting issue... parts don't stay where they were unless you duct tape them"
On Earth pieces would fall to the ground and lie there if you didn't duct tape them to something. Workers and the equipment they work with are all moving in orbit in relative velocities, haven't you ever watched the NASA channel?
Quote: "They still need to test it, I can build a powerplant in the middle of the city, but I would still need to have the designs tested to make sure that it will follow regulations. And NASA doesn't test rockets after they are build, but before. They take each peice and submit it to the maximum (+ some) stress that will occur under abnormal conditions. These condtions aren't like every day happenings in space, so each part will still need to be tested."
Have you ever seen any facilities where they test space equipment? Among other things, some of the most important things they test is how the equipment holds up to an air vaccum, varying temperatures, and vibration. The machines to test this are extraordinarily expensive, and you would eliminate a good chunk of the air vaccum tests at the very least. As for the other things, if they don't work out in space we've still got them down here.
Quote: "But you would still need to send fuel up... and food, oxygen, water, (NASA is too lazy to build a simple ecosystem for these, or rather impliment it)."
At this point an ecosystem may be a bit extreme. You would need to send regular supplies of manufactured parts and replacement workers anyway (that's how they constructed the international space station), so it's no problem to send stuff up.
Quote: "There will still be machinery, just diffrent machinery, and the reason there are high numbers of people working on a project is because there are very few people working on the same part. Each part needs to be built, tested, rebuilt, and retested."
Are we talking about all the people who make equpiment for the space shuttle? If that's the case your aforementioned 2500+ workers is an incredibly large understatement. NASA in addition to producing much of the material in-house also contracts external companies for various other parts of their spacecraft; we're not talking po-dunk little circuit companies, you're looking at incredibly large corporations (think Lockheed Martin, Boeing, and General Dynamics), and they have thousands of employees working on NASA projects in addition to NASA's own personnel. Each of these companies would be able to spend less on testing equipment and testing employees (they typically have separate departments for testing) because NASA would have a cheaper and faster solution in orbit.
Quote: "The only things you eliminate are materials. You don't need heat resistant tiles, nor big engines. Just the stuff to get you outside of the atmosphere."
I'm a little confused by this, the whole point of getting the big engines installed on the spacecraft
after breaking the Earth's atmosphere is fuel conservation so we are able to get further on the same tank of gas. Heat resistant tiles are not necessary only for breaking the atmosphere, but also re-entering it.
I'm going to eat you!