Besides the condition of the property and possible repairs, what else do I need to know to analyze a property properly?

I'd like to find a deal using creative financing, but also don't want to be stuck holding a property if we don't have the capital or reserves to properly work it.

We do ask the questions we're allowed to ask, and we do ask for the proper proof.  

How do we properly do this ???

Many will talk a big game and you will want to do a thorough check on them to ensure what they say is what they do.

If you properly serve them the notice and they still don't leave then you proceed to filing the eviction. 

I hired an attorney to ensure we had someone in our corner to protect our best interests.

Is there anything specific that I should ensure that they do/are responsible for?

Yes, working with an attorney may be expensive in the short run but hundreds of people here (me included) wished they had all the proper doc's in the beginning because it would have saved so much time, hassle and money. 

But, in all honestly, it really depends on what sort of assistance you need to PROPERLY close the transaction.