I think location may matter and obviously what you want in the insurance.
May plan in TN (from a local insurer) is 1 Million coverage ..... 2 Million Aggregate. This is 91.?? a month for me and 4 employees. I DO NOT have garage keepers..... which means I cannot drive the vehicles - that would be $140 a month. This does cover cars,buses, and RVs. This also carries a 1000 dollar deductible.
In thirteen years I have had 3 issues....... an employee passed out on a plane we were doing in St. Louis and scratched the britework - was an easy fix and she was not hurt.
A seat would not go back in a car I did roughly a month ago - his wife wiggled around in it and fixed it.
A door holder (plastic T) on an RV was broken with a brush (they are very cheaply made - be very careful around those lol). I bought a new one installed and sealed it ....I think it was $7.
My point..... I don't think insurance is worth it unless you are trying to land big clients.... the only reason why I have it - otherwise I don't think I would come near 1,000 in damage unless I do something very wrong and am not careful, or if I hire a complete fool and fail to train them properly or watch over them.
None of this probably helps at all..... but I hope you pull something out of this long response lol!