It's also helpful to look into insurance coverage for fire-damaged properties, as some insurers might be more selective about coverage.

So I’ve read that unbrella insurance providers require you to use them for car and home.

Curious if any General Contractors have recently originated commercial general liability insurance and build units that are sold as Condo/PUD's.

So, you can put them in an LLC that you own 99% of and your wife/partner owns 1% and put all the properties on a 1065 Partnership return.If you have enough insurance, the proper coverage and avoid "dumb" mistakes that void your coverage, you don't really need an LLC.

Having your son involved in the loan, title, and insurance policy does have both benefits and drawbacks.

Someone can't insure typically something they don't own. 

Buildings are the same age.Is it possible that the insurance brokers advises the insurance companies to do those inspections?

Understand your anxiety but remember you carry the insurance TO mitigate the risk.

Generally there is some coverage for vandalism, but you'll have to look at your policy to find out for sure.

Umbrella insurance is usually a very large policy of $1 million or more, extending your coverage for larger situations.