It is a factor to protect your self by a lawsuit or a failure of your business.  

The 401k loan will not affect your credit report or your DTI.If the 401k is with a previous employer, look into the self directed IRA or Solo 401k options, which allows you to invest in real estate.

I've seen meetings that were focused on flipping and then all of a sudden someone mentions self directed IRAs and pretty much hijacks the meeting for the next 45 minutes. 

My job is interesting, but I crave the freedom of self-employment. 

If you really don't then you can avoid tax and possible penalties (depending on age) by moving the IRA to a "self directed" IRA account. 

One thing to bear in mind is that flipping income is usually going to be considered self employment income.  

The investments are a mix of commercial property deals (self-storage storage, grocery anchored shopping center, small hotel, NNN developer misc parts of country).

Like with many self-help books, it's not rocket science, but it puts the concept into perspective by starting with the question that people often ask, "How much money do I need to retire tomorrow?".

We are both self employed but show very little on our tax returns.

It makes sense for a private owner/self manager.Lastly, if the resident does not take possession within 5 days of the start of the lease after indicating they will not be, we post and mail an abandoned property notice with a 48 hour response window, then start the deposit accounting process.