This prevents them from replacing the 10-pound Chihuahua with a 150-pound Rott. 

I'd suggest not noting things like "stabbed coach with a knife" and instead "7" long cut in left cushion of couch" and "4 sq ft area of carpet under den window coated in an unknown substance that stained the carpet". 

The Solo 401k trust does not prevent the use of LLCs in any way, but the trust is sufficient to provide checkbook control and most Solo 401k investors will invest directly with the trust rather than using an LLC.4.

Unfortunately the placement of a water heater in close proximity to the water and vent hook ups is preventing the tenant from fitting a washer and dryer unit set up in the cabinet space provided (side by side and stacked config not possible).

Otherwise, you can re-stain them with a close enough color to minimize the amount of rework.

After closing I heard that the area is known for the windows to be sealed to prevent break ins.

How do you handle preventing this? 

Rather than perform tests to make life more expensive these simple steps will cure most issues.Yeah, Killz can be a great solution for covering stains, especially smoke related.

I did compensate some with a free month and a lock to replace the cut one but that was a business decision to prevent negative word of mouth.  

If something truly was wrong that you could have prevented or handled a lot better, thank them for leaving a review, apologize, own up to the mistake you made, and explain how it’s fixed so it won’t happen to future guest.