Any thoughts if an individual property can negative cash flow to provide capital as long as the portfolio is still positive? 

If a cash out refinance, many lenders will allow the cash out to satisfy the reserves requirement.DSCR lenders generally let you vest either individually or as an LLC.

I joined Bigger Pockets in the hopes to connect with like minded individuals who would like to mentor and or just overall help one another so that everyone can be confident and achieve the best possible outcome as we embark on this Journey of investing. 

If not, even though you are a re pro, losses are passive & deductions are limited.There are 7 scenarios that will qualify as material, and you only need to meet one:*500 hours*Substantially all participation*> 100 hrs and at least 1/2*Significant participation*5/10 years*Personal service activity w participation in last 3 years*Continuous participationTo materially participate, you must be involved in the operations of the activity on a regular, continuous, and substantial basis.Once you pass the pro test, the material participation often comes along for the ride.You can elect to aggregate all rental real estate for purposes of measuring material participation under Sec. 1.469-9(g).Your time spent on all your rental properties (STRs don't qualify) counts as one activity, making it easier to materially participate.In order to make a strong case with your CPA and the IRS you need to document your hours.Best practice is an hours log where you are as specific as possible.

If a cash out refinance, many lenders will allow the cash out to satisfy the reserves requirement.DSCR lenders generally let you vest either individually or as an LLC.

I reached out to an individual selling a home for 45k, cash only.

You may already know this (you should know this), the JADU requires owner occupancy on the property to be rented as an individual unit.  

My initial question is… Is it good or bad to have individual septic for each mobile vs one big central unit??

This City required individual lot grading plans, signed & sealed by an engineer, for each building permit.

As someone who moved to Waco from Miami just because my wife got a senior position in Magnolia, I've met many families and individuals who have come to Waco from LA, NYC, Seattle, etc. just to work at Magnolia, SpaceX, Baylor, and some big churches in town, such as Antioch.