Single-family homes and small multifamily properties (duplexes, triplexes) are solid options depending on your goals.

I would still do due diligence such as whole property inspection, lead inspection (depending on when the property was built), appraisal, etc. 

I think you can go as high as 15% but it's cutting into your margins and depends if you are a GC yourself or not. 150k is close to a million or more.

I'm assuming if its a full build out it ran in the area of $600K +/- depending on size....odd to think it got built out without a lease or other commitment from someone.Ultimately in my world (retail medicine) it comes down to the physical location and attributes as it relates to the surrounding demographics and populations. 

Also, depending on the amount you get from your divorce, you might have more options. 

I have them tell me how long a project will take to complete, and then I add buffer days or maybe up to 2 weeks, depending on how long / complex of a project it is and potentially accounting for weather if it is outside work.

Depends on if you have panels, crazy layouts, etc.

The idea of debt-free is that if a person is going to retire and has to completely depend on the income, they don't want a severe recession surprising them and causing them to default on the debt and losing the properties.In a normal world, I would do that as well.

There is a lot of variability in this answer and, like all things in real estate, it simply depends. 

Things to consider when buying a new build are appliances, fans, blinds, and back yard landscaping; sometimes we can get appliances included, it just depends on the situation.