I know it may sound common sense, but people do struggle with understanding that water follows gravity.

One thing to note when getting conventional mortgages and spouses.There is a 10 limit per person for conventional financing.You can either do 10 conventional in each person's name which would be 20 mortgages for 2 people or if you do the mortgages jointly, will only allow 10 in total.My thoughts are not to own joint assets until you are both married. 

There have been so many changes to make people with bad credit look good they should be fine without this change. 

you are going up against people and companies that spend thousands or even tens of thousands of dollars a month in marketing. 

In my area people are generally only house hacking duplexes or houses with ADUs.

agreed. what I see is a major issue with used homes is plumbing and people NOT doing sewer scopes on their home inspections.. 

Meaning how to attract the type of people you want to your STR listings and how the heck you are supposed to know if there is a market for your type of "customer" in the area you are investing.

Mistakes I see people make is they plan on living there a short time and over renovate the property where they will never get the money they put into it back. 

Also looking for feedback from people that don't work for BiggerPockets or are biased :)

Mass deportation of 11 million people is unlikely.