I am not saying you should not do it, I am just saying if you are going to do it you should find a way (limits, tourneys, hours, bonus whoring, etc) that there is a 99.9% chance of you succeeding in it. That will require some introspection and preplanning on your part.
I think bonus whoring can be a way to boost your income at the lower limits (1/2 fall in there) and give you a buffer to runsof bad beats. This will be especially helpful for you to get a jump start with $10,000 to start.
You and your wife are both going to be playing? That is a cool idea.
The biggest question would be, can you HANDLE if she starts raking in more wins that you do?
Again, good luck with this. I am also interested in having poker be at least a component of my own income. I think for myself that will be a part-time component.