I'm in the process of learning Colemak now. I'd love to use QGMLWB, but I liked that I was able to use Colemak on my Macbook, Windows box and Android devices without having to install anything extra. I figured that the few extra efficiency points I lost by sticking with Colemak would be offset by its comparatively broad availability.
Even a modest motherboards costing $50 minimum. A cheap GPU could run less than $50 if you're lucky. A CPU's gonna be at least $100. A power supply could go for $20. A case $20. A hard drive $40. You're already over $250 and this PC won't come close to matching the graphics performance in games of an Xbox or PS3. I'm a PC gamer who uses a $1000 gaming PC and a $1500 gaming laptop, but I understand why people buy and will continue to buy consoles. It's a no brainer.
If you need a $250 PC, your time probably is worth less. If you're buying $60 console games instead of $5-$30 PC games, I hope you're saving a lot of highly valuable time.
Why would you want to waste your time with a retail PC anyway, loaded down with time-wasting adware and free trials?