Interest rates and insurance premiums are breaking some deals.
For your cash flow estimates you should double or triple your estimate for insurance and see if the deal still works for you. (On that type of deal it should but play it safe)
Even if the seller can show you a current policy and that is what they are paying now you as the new owner may not be able to secure that same rate even from the same insurance carrier. The insurance market is very tight right now especially on older buildings.
Many carriers who have policies on the books will not accept those same properties as "new business" or if they do the rates are 2x-10x what the current policy premium is.
The best way to verify that is call the current agent for the policy and ask them what happens when you buy it - will the carrier still offer a policy? if so what do they think the rate change will be? Can you buy the LLC and assume the policy?
I see buyers getting surprised by this often when buying older buildings.
The more time you give an agent to quote the better the chances of getting a competitive rate - a lot of buyers start calling agents when they are going to close and want it NOW NOW NOW> you will pay more this way.
Give the insurance agent a week or two to shop the rate and get the agent accurate documentation proving the age of updates to the roof, electrical, plumbing, hvac, etc and good photos of the property to allow them to sell the property to underwriting.
A lot of people don't realize two sales are made for an insurance policy - one to underwriting and one to the person buying the policy. Right now in this market the first sale (underwriting) can be a LOT harder to make on older buildings than the second one (to you the buyer) lol.