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.

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  see specialised area, unfortunate they did not make your parents aware of the rule before they bought.

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

Our inspection uncovered that the smoke detectors were battery powered.

If what you say is true about your possible profit, you may have uncovered a gem.