End of the day it will come down to your profitability in your company.. you balance sheet and then how much weight your PG carries.  

HENCE MY PROBLEM, SHOULD I OFFER THEM A RENT REDUCTION? 

Hi Rigo, I'm a realtor and would be happy to set you up with search criteria so you receive daily auto e-mails alerting you of any new listing, price reductions ect.  

That can hold significant weight in determining what will ultimately be your filing state.

(again barring any evidence of structural damage due to a poor foundation) If you repair the foundation before any "problem" is discovered, you are already guaranteeing yourself a reduction of 21k or more (cost to repair the foundation) in lost profit.In any case, best to you on this flip.

As Zachery mentioned, talking to ppl face to face holds major weight.

You can look at inventory levels, DOM, price reductions, housing starts, etc.

A good property manager is worth their weight in gold, but I totally understand some are there just to make money, while avoiding lifting a finger...yes, Nam, it was his podcast.

Here is some good language on this from calcpa.org.When a self-employed individual maintains more than one trade or business, the questionarises as to whether the limit is based on the sum of earned income or loss from all trades orbusinesses under common control [as defined in IRC 414( c)) as modified by IRC 415(h)], or ifonly the trade or business maintaining the plan being tested is used.For purposes of the IRC 415limit, earned income for the self-employed individual is based on the sum of the earned incomefrom all the controlled trades or businesses, regardless of whether the related employer maintainsa qualified plan [Reg. 1.415-2(d)(6)].EXAMPLE: Andy, a sole proprietor, operates a law practice as a sole proprietorand has $100,000 of self-employment income from such practice for 2008 (prior tothe reduction for one-half of self-employment tax).

A glowing review with details might hold more weight than several brief reviews that some host just pasted, or a boilerplate good review because they didn't want to leave a bad one. - ENCOURAGE GOOD REVIEWERS - Let guests up front know how important it is for you to earn their 5-star review.