In your CAMs charges, do you include the fee for a management company or manager?

Quality isn't as good and they charge more.  

What would be an appropriate charge for water passthrough?

Not all properties have an HOA/maintenance/common charge fees.

If the unit is damaged because the leak was allowed to continue, I would charge the tenant for the additional repairs required.If tenants have such obvious lease violations, there is a high risk of additional problems down the road.

Now if you're investing to be hands off that changes things a bit, but you seem to be doing owner occupied units so I'm betting you are putting in some elbow grease.  

I'd place my bet on SFR w/ ADU over duplex, based on what you've said, but the price of the opinion that actually matters is going to be an appraisal fee and waiting for that to come back.

You don't lose any money by doing that, of course, but you don't make any either.I know the reluctance to condos runs deep, I bet well more than 80% of real estate investors share that reaction, but I wonder if it's from their experience or if it's just that they are repeating the same thing they hear from others.

those are all Morris invest markets that is what I bet spurred this question..  

As an aside: Contact your credit card company and tell them what happened and most likely you'll get a 'charge back'.