I have done flooring, tile patios, hot water heaters, masonry work, molding and concrete work on personal projects so I know some about cost of repairs and timelines of projects (Always over on both from my experience).

I can rent some equipment and demolish the old building myself, but what should we expect to spend getting a concrete pad poured, wiring and plumbing run the 100 ft or so from the main house, etc? 

This only really works though if you either have a concrete plan to refinance the money or you have the cash (or will have the cash).

It would be a case by case situation on these properties so if you have more concrete numbers we can look at them to see what they will end up after the Refi.

A window looks so much better when there is nothing blocking your view from the outside, and it looks more modern.Also too, can I polish a fogged window to make it clear again?

Got a ton of major repairs done already (new plumbing, gutted basement, new fence, roof, chimney work, concrete work/sidewalks, parking, new yard, etc.

Just what we want to do when we thought we were finally finished, dig up a big ball of concrete from the ground and set a new mailbox post!

The surface beneath the current floors is a concrete slab that looks like used glue to hold the parquet tiles down.

(is the area viable as a MTR, can a shed be rented out for additional storage, etc)In general you want it to cashflow as an LTR but asking as there may be other items that should be included, removed or changed that can help you make a more concrete decision. 

We need build a concrete shipping loading dock in front warehouse, the property is zoned as Light Industry already.