I would recommend sharing your plan with them (so that they can match you with the most relevant loan products), learning about their experience in investing, and asking them what they are fueled by the most in their work.There are many technical questions you can ask, but I find that mortgage lenders are highly regulated in our new housing market (post 2008), so when I'm dealing with the reputable firms in my area I want to focus on getting to know the Loan Officer and understanding if they have the mental skills to help me accomplish my goals. 

@Aaron MarxHere is a useful mental exercise.

Old school mentality and I’m two for two on dealerships since I moved, that don’t align with my standards of business (long term business minded vs short term gains) I agree though after having these conversations.

The intent and want has to be self serving and you need to truly look in the mirror and be honest with yourself.Having the abundance mentality is the right mindset.  

Think of the boost in will power this would give you after you closed on your first property.

I think if anything it will boost ownership of younger families.  

Build your network and be ready to pull the trigger (both mentally and financially)Best of luck

Do I need some document at closing which attests to her mental capacity to make this decision?

This might be a way to boost income by focusing on squeezing the potential out of any given purchase. 

@Monique O'Dell Rich Dad Poor Dad and Set for Life were great at getting me on the right path mentally.