The contractor will come up with a plan, figure out the logistics of implementing the plan and then execute the plan.

There can certainly be increased liability, potentially higher operating costs (keep in mind that some private systems can actually be cheaper than municipal systems, especially if bill backs are implemented) and an increased management burden associated with operating private utilities but I feel many investors immediately eliminate MHP investment opportunities from consideration due to the sole fact that they’re running on private utilities.  

Get started shortly after by implementing 1 to 3 of the above steps.

It will cost more money for them to implement the sales collecting  and tracking software.  

By making cash offers using your HELOC you can usually get steep discounts that would allow you to implement the BRRRR strategy by buying cash with the HELOC, building some equity with a rehab and/or buying below market then refinance out and expand your portfolio.

When you reach the point of having assets with equity and/or cash flow to protect, and you implemented/exhausted all the other means of risk mitigation (insurance, umbrella insurance, proper property management, etc.) than you can complicate yourself with more elaborate asset protection structures.

However, if you continue to be consistant and learn from what isn't working and implement new and improved strategies, then you'll greatly increase your chances of success. 

@Jon AllenThe implementation of the LLC under the umbrella of the IRA does not change the rules in any way. 

If not, is there any threshold you see for a portfolio to justify implementing this approach?

I love the idea of a comprehensive “new tenant handbook” and will definitely implement that with future tenants.