bryanyin

Well, for now, I don't see any problem here with 70-30. But have you considered the future, what if he can bring some new customers or maybe worse, he can't maintain good customer relationships? And, if your biz goes larger, you need a third guy, how to share with him?

We use svn. It's easy to manage folder-tree, easy to use and better for non-tech people.

I'm in a BYOD company. I use Mac, good thing as you said, it balances personal use and work use. Several friends use Ubuntu as alternative to Mac. The rest use Win as they need to play game at home :)