There are no secret formulas and no conspiracy but security is need to protect the public.

Should the government who spends billions protecting endangered salamanders and or spend Billions on Super fund sights..

The builder may or may not have had problems but neighbors may have raised heck or collectively made an offer purchasing an interest in specific lots to "protect" the homeowner's property values.A trick of builder developers is to build nicer homes first, then infill latter with cheaper homes allowing the nicer home to influence price, they also add commercial later on as either depresses value of the nicer home built first.

In the end, it protects both of us from misunderstandings, which can lead to hard feelings.   

Same for a lot of other RE jobs like wholesaling, property management, developing, etc.If you're holding rentals then owning them by an LLC might give you some asset protection. 

If anyone is interested, I wrote an article about a case involving Encinitas, California homeowners that sought to protect their homes by fixing seawalls, but ran into the force of government.The California Court of Appeal Allows California Coastal Commission to Force Permitting Concessions for Seawalls on Encinitas Homeowners - http://www.businessjustice.com/the-california-cour...

A good HOA will protect you from coming up with large sums of money for deferred maintenance. 

Plus you still protect yourself from ridiculously high bills and your tenants will remain conscious of their usage to avoid having to come out of pocket.

We own a property and instead of investing money into repairs we want to partner with someone to manage & fund the rehab, and share in the profit.We are moving forward with someone already, but I am not sure what is the best way to protect all parties ownership.

What structure has the most tax advantages while protecting its owners and allowing for the use of investors?