Well, IMO the times where you can make some serious profit with mining at home are over. It is becoming a serious business. But thats only normal. Every marked becomes more competitive as it grows and that the Small Private Businesses die out is also normal when a marked grows.
Don't expect to make some serious money mining. But if you want to get in as a father son project where you can spend time with you son and build something together have fun and maybe puts out a little bit of money, I would say buy some usb miners.
You can setup a miner like this one:
http://i.imgur.com/BJCe9a0.jpgAt first, get it working some how.
Next project could be to get a dedicated Raspberry Pi running for it, so you don't need you PC running.
At next build a nice housing.
Improve cooling to make it more silent.
Always something to work on and have fun together and maybe even a little bit of profit.
This farm you have a pic of looks expensive, real-estate consuming, and less profitable?!?
