His team provided specific items to track with a template which helped my wife and I adjust for the following tax year. 

Every state and municipality will have their own rules, however, if yours is any similar to ours here in Los Angeles, your plan set should specify that you will need a deputy inspector for specific items in the foundation and possibly in your sheerwalls (part of framing).

Here's a link to the IRS website noting specific items that are included in the cost segregation study report. 

I'm not sure what to do, at this point she's already started the process and I have verified her credit score, but I like the idea of doing everything through RentPrep because they look for landlord specific items.

I usually see people get standard home insurance and then an additional policy that covers STR specific items.

While it may not have EVERY tasker, it should highlight large specific items you are looking to have completed.

Unless specific items were listed as a contingency for that rent amount, I would say no, and understand that they moved in as it was, with all of it's "faults".Seems they take you for a suckered!

You'll find out who is the cheapest for specific items really quick this way

It is not standard for inspectors to include these specific items as part of their base fee.  

That’s what I like about numbers and specific items you can challenge them.