You may want to identify which state the property is in.Just my two cents and not by any means legal advice, I would suspect if down the road a lawsuit was filed and during the discovery process it became known that you had an inspection done and your inspector pointed out to you the furnace was not up to code and you purchased anyway much of the rug has been pulled out from under your case.Certainly, if the seller knew the work changed the status of the inspection and then showed you the earlier inspection approval it might be different but you said to assume the facts as given that the seller didn't know the construction had affected the status of the furnace being up to code.At best these may be questions for a "trier of fact" (the jury) to sort through.

*Repairing cuts, burns, or water damage to linoleum, rugs and other areas.

They install area rugs if they want comfort.

And this factors in zero future appreciation on the property, zero rent appreciation, and doesn't take into account the tremendous tax shield from aggressive depreciation.So I'd characterize 30% as a slam dunk, 40% as very reasonable, and 50% as doable with intensified effort.

Probably the "easy button" here for hardwood is putting down area rugs that cover much of the floor.Look for closeouts, discounts, etc.  

If it is a flip, then it depends upon costs.Keep an extra couple of boxes of tile when the floors go in, same die lot, and absolutely no reason floor shouldn't last for 25 years +.This means no carpet problems, no damaged hard wood floors, normally no pet problems, none of the headaches associated with the other floor types.If a tenant wants a warm floor, they can throw down a throw rug and take it with them when they leave.Only flooring that makes sense for the long-term landlord.

The tenant wants rugs, they can furnish and take them with them.

I keep a rug over it because I have guys who have to come to the house until I sell it next year.

A nice shower curtain, rug, painting, plant, and towels, could achieve an even better effect than painting out the walls and cabinet. 

it is washington state - maybe they don't want you re-flooring to prep for sale, those dirty old rugs were good enough for you.