This one had a spooky feeling basement, but NOTHING visually unusual... until I looked at the photos. 

Pesticides can harm pets...and it can be a good deterrent to tenants requesting you to poisoning the area that may affect their pets.4) Electronic pest deterrents are cheap and instructions state it could take up to 3 months to get results...in 3 months, those pests are doing other things....

We are visual "creatures" and the professional just has a way of sprucing things up for us!

I think painting them white will have a significant visual impact on the house, allowing us to maximize rents.

The changes are very visually uncomfortable for me.

I find it hard to visualize what you are calling the "back wall".In your original post you referred to a top wall, a left wall, and a bottom wall.

depends on the demographics.If its a retirement neighborhood, lots of elderly people some may find it a tripping hazard or a pain for walkers, wheel chairs etc...Down here in south Florida many older folks would not buy two story homes because of having to trek up and down, and we have lots of older folks.Sometimes the elevation difference can be partially minimized visually by using creative threshold transition pieces.

If there was something structurally wrong with the house or it was extremely visually unappealing, sure.

I don't have pictures right now but I can take some and show you if that would help to get a better visual idea. 

I would imagine if you wait 5 years you'll have greater efficiency, cheaper in home storage systems, and potentially a far more visually attractive option.