I once purchased a multi unit that looked excellent but when rains can the whole place was leaking and I already had tenants in. 

Then my managers only need to push the play button and I know all of the docs are presented the way I want them to be presented.

What are some signs that generally point to an under slab leak?

Basically you need to find out the market value of the property ARV when it's fixed up.I wouldn't even go look at it without closing docs from this seller and additional documentation from them showing they are who is on the closing docs.

When I'm buying something without the benefit of title and escrow (and I've done it plenty), I know going in that when I go to re-sell, that title will have issues with all my DIY transfers and docs.

I did a search of the forums and found very useful information, but none specific to a property manager that wants to be the trustee.Also, any recommendations of attorneys in Ohio who can review trust docs would be helpful.Thanks in advance!

While they might leak, they can be easily fixed with epoxy.

The 180 day thing simply means that if your lease option is longer than 180 days, per Title 2 Chapter 5 of TPC then you have to have certain items/verbiage in your docs, and be able to provide the mortgage info etc. to protect the buyer.

If it helps anybody: the last leaky flapper I replaced didn't fix the leaking.

It will require almost the complete remodel of a bathroom and replacement of 1000 sq ft of carpet, on top of the 5-20K to solve the basement leak problem.