Horizontal" construction costs are going to vary quite a bit based on the particular neighborhood, and lot, you choose to build on; but I would figure $130-$150/SqFt for "vertical" costs.With that said, I'd be more than happy to speak with you in greater detail to help shore up those numbers.

Replace all the horizontal runs in the basement that you can now.

Most of the cracks are horizontal and a few are of the stairstep variety.

If I was a betting man, and had only this picture to make my bet, I would say that this is an freeze-thaw crack - pressure from the soil outside the foundation pushing inward (hence the semi-circular pattern - not stair-step, not vertical or horizontal), so it might be a matter of some exterior grading/drainage work followed by an epoxy grout crack filler repair to remove moisture.I recommend you get it checked out - put a contingency in the contract that covers your bases, so you're only out a couple hundred bucks for a structural inspector. 

In one of the units, inspector noted bowing / inward movement, bending movement, and horizontal cracking of front foundation walls.

They don’t provide appropriate horizontal back pressure and are built to fail much sooner than poured concrete. ~80 miles from where I sit right now probably 60% of basements with blocks have been replaced or reinforced so that the house sits on steel posts and posts have been installed along all exterior basement walls so that the blocks can’t shift anymore.

I have typically done plain white horizontal mini-blinds, and live with having to replace them every 2 years or so.If pets are allowed, especially dogs, then all blinds are basically need replacing at every turn over. 

Horizontal/level doesn't matter.

Whitson Gordon (non BP Member)Pros: Basic is free with 60 MB of new uploads per month and sync across 2 devices Cons:Not designed for real estate Cost: $34.99 for Plus with 1 GB of new uploads per month with synch across all devices $69.99 for Premium with 10 GB of new uploads per month with synch across all devices and more featuresTrello - A Trello board is basically a web page containing lists laid out horizontally on the page so you can get a bird's eye view of your project.

I am just the mezz on this one... someone else will do horizontal and vertical...