One comp is great, but I would look for another to confirm value. 

Quote from @Jay Chung: Software is a common question on BiggerPockets.

I can think of mortgage, taxes, insurance, STR insurance, water/sewer, electricity, trash, internet/cable, cleaning (can pass through), supplies, and software.

@Corbin HiblerI'd first confirm the extent of the damage.

You would have to contact the current housing committee and fill out a rent adjustment form, if approved the portion between the housing committee and the tenant depends on what the tenants income and ability to pay and all of that will be listed on the confirmation

My BEST advice and the truest advice of any REAL estate professional is to confirm for yourself.

There is also a software named LandVision from LightBox that has a good layer that lights up every parcel that has traded in the vicinity and timeframe you are looking for/in. 

Also I was told -to get ahead the competition (and my suspicion about the prevalence of 2-3 bedroom beachfronts was confirmed) - we have to go pet friendly and accommodate 10-12 in that 3 bd house.

I have managed my rentals on a very basic spreadsheet (poorly managed) and it is time to clean up my accounting and legal structures.Can anyone opine on a cheap and effective software for the accounting side of the business? 

If the system is not user friendly, people will move to simpler softwares.