Can I consolidate Insurances on different rentals and save?

Hi BP Members,

I currently own 10 rentals in CA (average Marketplace of around 400K, give or take). Also carry an umbrella. I am mostly with Liberty right now but also have Safeco and ASI.I see that overall I am paying somewhere around 7K on insurance per year and was wondering if there is a way for me to have 1 insurance policy for all my rentals and if yes, what would be the advantages/disadvantages of that, and if that will help me save some money.

Thanks,

Rian