Get vandalism and theft coverage.

Andrew,The coverage for Vacant properties has improved over the past few years and the coverages available may not be a big drop off from standard coverage.  

I don't know what your damage coverage is, but I'd check with Shelter Insurance, as I found they usually found they are easy to work with and have the best rates.

@Neil Haven a four unit property will qualify for many commercial programs, which may be the way to go.With a commercial policy, you may have more flexibility with choosing the building limit and can pick and choose which coverage's you want.I would suggest calling a local Independent agent. 

Assuming that there is a liability greater than your insurance coverage, everything within the LLC is at risk if the LLC is the one being sued. 

I got a quote of $1000 for 44 months coverage with a deductible of $45 each claim.

Kinney Pike is the insurance broker I use in Vermont to find me the best coverage and rates on multifamily.www.kinneypike.com

I'm not sure if Indiana offers a non-NFIP insurance option or not but if they are like Ohio than NFIP is your only option... however not all agents understand how NFIP works or how to give you coverage options.If your main goal is checking the box for flood insurance at the lowest possible cost I would suggest asking the bank what is the least amount of coverage  and what is the maximum deductible they will accept - then get an agent to quote it that way.I'm NOT saying this is a good idea to insure your property this way - you really need to investigate the risk and talk with your agent on what your level of risk tolerance is.Many agents will try and quote it at the full reconstruction cost amount like it's an owner occupied property.

SFR in Humble for $2000 annually, which is in addition to any other hazard insurance or liability coverage.

He has done a ton of work in San Antonio, with his latest news coverage being around his Risingbarn.com project of tiny homes for affordable housing.