I dont think this a good way to kill a deal, and if you are assigning and the wholesaler is not offering the contract, that is a deal killer and the only way they have 5 other buyers lined up to buy it without that info is if all 5 other buyers are ignorant or crazy (or both).

I can tell you that I used the root killer every 6 months and it helped a lot! 

Even if all your numbers are as cheap as a $5k kitchen I cannot see it coming in close to $100/month (you are almost at 1/3 of it on 2 long life items - flooring is often a killer, in my unit refrigerators are higher than one would expect).  

Not sure how extensive your mold problem is (sounds like it is), but I know you can buy mold killer or just do a bleach and water mixture and spray it everywhere.

Only real downside is acquiring existing properties due to the demand, so I have been building new constructions. ya that double tax in Memphis can be a killer... there is a recurring theme with guys I know in the business that cant find enough inventory and have gone into construction of new homes..

Does anyone have any experience in treating their pipes with a root killer? 

In CA, the equity deal killer is Medi-Cal (DHCS).

I was afraid of this, tax is killer.

Property tax in TX is a killer.

I think it depends on your customer base and it is a great strategy used by many investors/landlords to reduce turnover costs.The 2 year lease encourages resident's to stay longer and reduce turnover, which is one of the biggest killers of profit in the rental business.