Try just going to dell and get an inexpensive computer with a hard drive big enough to do the job you want, if all your looking for is a hub type computer, that should do the trick, and shouldn't cost more than 4 to 6 hundred dollars, or maybe even try craigslist.com for your area and see if someone is selling a good little computer for cheap.
I need some suggestions on what I should do. What I want to do is, purchase two netbooks and one laptop and a new home pc/server to link everything together. The netbooks and laptop I can figure out but the pc terminal is my area of concern. I only need something which can be the main network hub and back up drive for my home. I know I can set up most computers to do this, but it is overkill since I will rarely if ever use it as an actual terminal. IF anyone has some pointers on software, hardware, where and what to buy I would really appreciate it.