Contact a reputable RE attorney in the area where the PM is located.

Where did appraisal of $330k come from?

I doubt that anyone would know where you are in the world when you sign via DocuSign.  

For FF tenant have a direct booking site where they can finalize their reservation.3.

Worst case scenario, it becomes a legal battle where calamity strikes every person involved. 

I agree that 6% where this is is low but it looks like the seller is using 5.5%. 

From what I've read and watched - what it seems like in this case is you would assign the deal and not be involved...again I'm speculating since I haven't done it myself but I am trying to learn too.Where I think you would probably want to be is having the transaction go into a performance deed where the buyer has to continue to make payments.

I have never invested in real estate, and if I get Europe, what do you recommend I start studying (legalities, policies, trends) and where can I find the necessary resources/education to prepare to look for deals in Europe?

You are on the website where all of the action is.

Is it resonable if I ask the tenant to pay share of the cost to cover the ground where cat left its waste?