"Didn't have a vast amount of time to put this list together so theres probably plenty of changes you can make. "
I certainly don't want to be a stick in the mud but it's very tough to compete with vendors that sell gaming computers as an established business. I'd be hesitant to do so, as anyone you sell to will expect you to provide tech support of some kind should they have a problem. Sounds like time may be in short supply
No problem being a stick in the mud. This isn't my profession, nor do I look to make it my source of income. Just a hobby/side project. I've done it for friends and family, just want to offer others an opportunity for a cheaper machine and I can make a little extra cash on the side. Only reason I wanted some pre designed systems is to just give people an idea of what they can get.