Financially my full-time job is our main income as a family.Job is demanding.

the bathroom tile is too old", etc.I was the only person crawling under the house, going in the attic, looking in the Main panel.....everyone looked at me like I was nuts.So of course I bid it way higher than anyone else and did not get it.

You can obtain up to 90% LCTV for your main primary house that you are living or 80-85% for your investment properties.

What are cost and time effort for setting up an LLC for REI purposes? 

I was mainly thinking about the effects of putting an entire strong cashflow back into the mortgage.

They are usually located South of the main city area. 

When you sell, you will likely get appreciation - but that is not the main purpose of your investment.Direct SF ownership might be safer - also, it might not be safer.   

There are two main approaches to getting started with Section 8.

So the main advantage of a DSCR in this case is just the fixed rate? 

In my experience strictly med buildings are generally developed in the same way as part of a campus or off the path a bit from the main retail corridor, so it really is only suited for that use.