I am an experienced construction manager and contractor, and can lend a lot of advice regarding rehabs, structural questions, and shortcuts that are solid ways to fix problems but will save you lots of money.

They seem to always quote it in $/square foot and it's an annual figure so for example  lower end retail in my area goes for about $10/foot.For the improvement costs (TI, tenant improvements) you can negotiate that with potential tenants but I would again use a short-cut $/square foot or you could do a specific list.

Obviously selling real estate would require A LOT of legality you have to learn, paperwork, shortcuts, etc. but do you guys think it would be a good idea for me to look into this?

Look for the "short cuts" to get the education that you want and make sure you are not wasting Time and your GI Bill on useless courses in University that turn you into another "whining Millenial with no skills" and a humongous dumb ***, Student Loan.

@Michael Wagner is spot on with his advice.There are no reliable short cuts.

Selling AS-IS would be the shortcut(15days)  for you, but scare off a lot of buyers.  

@Kyle H, one thing I've learned after 25 years of buying hundreds of houses at foreclosure auctions is that there are no shortcuts.

Unfortunately, there is no short cut if you are to research title - and real comps on each house.

You need to be careful not to take any shortcuts.  

I think there is a tendency for newer folks to look for the shortcut answer and by doing so miss the real answer.