Best commercial policy type for string of SFH?

[Levi T.]

I have the string of SFH, estimated value per unit is 75k-95k per unit. Currently we have 24, and we are chipping away at adding more in that location, at the rate of about 5-15 units everything 60 days, and I feel my policy is just crazy high. Each time we add more units I have to go back and adjust the policy. I feel like I should get some type of blanket commercial policy for Virginia, or at least that location, that covers any and all SFH we pickup. 

Is there such an option, that's not going to cost me a small mint, that can do something like that? I'm shopping around and need a good deal that works.