Wouldn't that mean that half the income (in reality, it will be a loss due to bonus depreciation) is attributable to her?

As Dan touched on, this is can likely be attributed to most of the newer construction in the Greys Ferry area being on the north side of Tasker St. 

Plumbing problems can usually be attributed to a tenant's carelessness or incorrect disposal of items, and in such cases the tenant could be liable for the repair costs.

What sort of attributes of today's market would you consider supports the opposite, in that this is actually fantastic?

Even if you're not buying now, get on the MLS every day and practice analyzing deals in that area so you know what a 2 unit, 2 unit with garden, 3 unit, and 4 unit go for and how certain rehabs or other attributes move the needle.

I suppose these buyers are able to turn a profit somehow and this has to be attributed that the market has been doing well and interest rates have been low for quite a while.

I’ve now been a part of the Featured Agent Program as an agent in both Nashville, TN and just outside of Los Angeles, CA, and can attribute over $15 million in sales volume from the leads in just over 18 months.

Most of the answers in this post come with a health does of attribution biases; you're being told what other people would if they had you money. 

She attributes much of her success to having physical images, pictures, minitures, etc. of the material things she wanted.

There are no clear ranges for a good or bad cap rate, and they largely depend on the context of the property and the market.Say, there are two properties that are similar in all attributes except for being geographically apart.