Also, if you have other sources, like a 401k loan, to supplement the cost, you can make this work, as long as you can cover your mortgage payment with the rent, I would keep it.

I think the big question for me, is your ROI enough to supplement what you would have in the 401k at retirement time?

I would assume she is past that point and throwing more generic information her way will just make her frustrated. 

I know -- too generic a goal.  

The state of Minnesota actually has a generic lease agreement that is pretty darn good.

I want to supplement an income learning how to invest until it can become the income.

The whole reason of incurring the extra $300k in debt is to provide cash flow to supplement that $50k/yr.

If it is generic, I would think it reasonable to understand that to include everyone.

Over the last 4 years I have supplemented my income by buying and remodeling 8 run down homes and selling them.

If you believe in software-generated graphs showing you "before and after" - then I have a warehouse full of weight loss supplements and anti-aging creams and house-flipping-millionaire courses to sell to you.