I called my local insurance company, as well as two major companies and was told "good luck." 

To set the stage, I'm owner of a short-term rental property in the Poconos in PA and we use a property management company for bookings, maintenance/cleaning, guest management, etc.This past weekend we had a guest booking but when the guests arrived Friday evening the house had no running water, though it had been running fine earlier in the day when the Property manager (PM) was at the house to give a final check and leave the welcome packet.

@Chungying ChuIf you want more liability coverage, ask your insurance company if you can increase it.

Insurance companies do not like Federal Pacific electrical panels. 

Here's an article with things to consider when selecting a cost segregation company.

@Noah Laker Will you be running the house or leasing it to a company.

You could also use "Doug's LLC and/or assigns" where Doug's LLC is your hypothetical company.As for the assignment contract, you can get one from an attorney for probably less than $1,000, you can also make a friend at a title company, they probably have a template they could give you.  

3) GPs tout years of experience in this space, how can LPs stay on top of GPs staying on top of hired companies? 

Yes, just like you claim depreciation on the use of your property, any company including an insurance company claim depreciation when they pay for your damage.

I almost exclusively sell bank foreclosures for a large asset management company, and I also do a lot of marketing for wholesale deals.