(Landlord Insurance, Umbrella, Flood, Fire)What rules of thumbs or estimations could I use to estimate the costs of such insurance?

I have an umbrella liability policy cover all of my property then could i purchase the liability through the management company. having multiple properties it would be nice to find a way to manage through one entity and have properties owned through others

With that said, there are so many ways to create value under the huge umbrella that is real estate investing.

Currently, I carry auto, home, and umbrella insurance through the broker and will want to still have a 1 stop shop.  

Don't forget a nice chunky "just in case" umbrella policy.

He carries my auto, home, umbrella, etc.

For a small operator it is generally considered unnecessary.....you can protect yourself just as well with plenty of insurance and an umbrella policy.

Another option is to have an umbrella insurance policy which provides protection as well

In my opinion you shouldn't have problem buying rentals under your name and buy umbrella insurance to cover yourself, same as managing it yourself if you want.

The IRA is the sole owner of the LLC, so the activities of the LLC are under the umbrella of the IRA and therefore afforded the same tax-sheltered status and subject to the same rules against self-dealing.