Phillip, I'm hoping home inspection would uncover any such issues.

I would say it depends on just how "move-in ready" you are expecting.If someone is sitting on a property that is in relatively good repair overall, with the exception of some paint, flooring, and minor kitchen updates (countertop replacement/cabinet refinishing) for example, as a result of inheritance or a property that may be more of an afterthought for whatever reason, then perhaps through direct mail you may uncover a handful of decent leads/deals whose owners haven't necessarily yet put the wheels in motion to get rid of a property that they may consider selling once they are given a slight nudge.

You have to work harder than these people and uncover a diamond in the rough that no one else has come across or pursued yet.

If you get a house under contract, try to sell the contract and are unable to do so,and rather than tell the seller that you claim to have uncovered issues during iinspection, then you are deliberating saying something you know to be untrue.

I've spent a lot of time reading books and checking out random forums over the years, but it is so nice to have all of this wisdom in one place. 

If not, see if you can uncover any and all reasons why the land might be offered at its current price.  

Might be interested in homes you uncover.

I found some nice ones so nice and so cheap and I know I can make $10,000.00 a week but I need a full time partner to be able to perform my advantage is that any construction materials I can get am for half of the price and most of the time almost for nothing and I am a subcontractor with tools and transportation and lots of experience in remodeling.

You can only make it "so nice" before you are simply spending more money.

Any floor joist should be replaceable assuming you have it uncovered (if you can see it, I assume it is uncovered).