Lots of these new construction builds were done very cheaply, and since it is wood framing with siding, flashing stucco, etc; if the proper flashing drippage and caulking wasn't done correctly you will often find leaks.

It demanded to replace full flooring, scrape walls and repaint costing entire year worth of rent from that unit.Question: are there technical solutions inexpensive to remove cat urine instead of replacing all wood , carpet and walls?

There are homes that have a architectural style where they just resemble a traditional log cabin, but are actually wood frame or something else with a foe-wood on the exterior.

One of the units does have a minor infestation of brown wood cockroaches, but since they haven't spread to the other units, I'm hopeful they won't be too difficult to exterminate.

Think of stuff like rotting wood on porches, etc. that no owner wants to spend big money fixing due to the low cost of the property.

I was already considering putting up a wood or vinyl fence to create a decent outdoor space for my tenant but that will only block the sight in the back. 

[See my post above where I told Hampton Woods: ..."

I allow for tenants to use gas fireplaces, but do not permit tenants to use any wood burning fireplaces.

sounds like the do hardmoney model and from the same neck of the woods.. would not be surprised if it was the same actors or an off shoot of them 

Landscaping has the largest ROI (of about 200%), adding a wood deck or a patio will also provide a big increase in value (100% ROI).Add living space, consider converting attic space, finishing a basement, or repurposing a large living area to add a bedroom without expanding the home's footprint - this will give you an average ROI of around 75%.