It may also make it easier for your estate planning attorney to line up ownership with your estate plan, assuming a CA-estate plan if a CA resident.  

We have a savings account where we split up into different buckets (from our w2 and passive income) and one bucket is for real estate and when we have enough to acquire another asset we will consider it.I am not a fan of borrowing 100% of the transaction costs including closing costs as it will be extremely difficult to make money many times on those types of deals.

The original deed listed multiple owners and percentages including her 8% interest, and now myself and the other owners want to sell the property---how do we get this retitled into my account (or my name) in order to facilitate the sale?

Depends on really what you are looking for:-Speed - some HMLS can go "no appraisal" so can close very quickly and beat cash offers if you are in a competitive market to buy-Interest Rates - can range anywhere from around 8% to 13% (same with "points") but not usually as huge of a concern for flippers since the terms are so short-Leverage - depending on your risk appetite / capital - this is also a top concern for some (almost always over and above rates/fees) can see anywhere from around 80% LTC to even mid 90s LTC (including 100% of rehab budget)

The plumber’s report indicates that the leak may have been caused by an overflowing tub or sink upstairs, but the tenant in that bedroom denies any such incident.As a result, I now have substantial expenses for the plumber and restoration company, including drywall repairs, painting, texturing, and reinstalling electricals.

For probably $100 you can get many books, including J. 

If all else fails, 😀 ReSure's got extensive resources on all these subjects in our educational platform (which actually includes some plagiarizing from Michael!

When I received the Construction Agreement they want me to sign, none of this is included.

This could include keeping track of the construction holdback.  

It would not be a terribly profitable industry, and a few large players (hopefully including my NewCo) would dominate the space.