Contract states something to the effect: Buyer's access to the property for Due Diligence. 

This is by far your most cost effective means to fix the problem.

Also, does anybody outsource their repair and property management teams and, if so, how did you make it cost effective?

The answer will effect weather i sell it, as i'm buying a new primary, or the preferred route of renting it out, then selling it later to take advantage of 10 yrs of appreciation to then help payoff my new mortgage? 

I would price out the construction costs on both intentions and then make a decision and consider the maintenance costs of either type if you plan on keeping it long term.Its location and demand in that area should effect your decision too as well as site accessibility,  land research, the land contour plus how you might use any extra space or the current zoning allowance or the utilities that exist.

The most effective way for me has been to look at the comment section of property posts and look for when these investors post their emails to get more information on a property.

Keep in mind this also effects your cash flow and CoC return so knowing your criteria for those will also help you answer financing questions.3.

That way even in slightly sketchy locations we can just do what we need to do to make sure things get done effectively and efficiently for ourselves and others.Again I appreciate the time you took to look into my post!

The buyers think they've gotten a great deal only to find out that, although they now own the house, the superior liens still are in effect.

Call up a realtor friend who can list it for the seller and then you buy it (effectively gifting someone 3% of your money).