I would have the conversation that your intention is to provide as much of the deposit back as possible pending damage.

I do not provide substantial services. 

Check in with @Joseph Chiofalo for STR loan options.

Did a home equity loan to pay for the water & sewer lines, removing knob and tube, some new flooring and some plumbing fixes. 

The Programs includes or covers:- Up to $2.5B in second loan purchases- A maximum programs duration of 18 months- A maximum loan amount of $78,277- A minimum seasoning requirement on the first mortgage of 24 months- Only for Primary ResidencesThe effect of a guaranteed government backed second mortgage for homeowners would be significant and likely put eligible second mortgage terms in line with below market FHA and guaranteed first position mortgage rates. 

I changed to a new provider this year, and got insurance at $1450, but had to replace a roof and water heater to do so. 

Based on the Insurance Market in FL now, you may want to check on both options.Those policies are designed to provide Property and Liability coverage together.  

I presume you are looking to assume the current loan? 

I was looking to payoff the underlying loan of $156K, and add construction hold-back of $250K. 

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!