In addition I require that tenants have renters insurance with a minimum of 100k liability in case a guest of there's is hurt on the property or something of theirs is ruined or stolen.

But ultimately, I would say you will want to consult with some retail brokers, who will likely be able to help with creating your merchandising plan and void analyses, as well as systems to understand traffic counts and demographics of the area (if you don't know this). 

The new AC unit was stolen right before the tenant moved in so that's $4600 I had to pay. 

My property manager said they will waive 1 month fees and marketing fees because of this but I am really pissed at the whole situation and am not sure how to handle thisYou need to do 2 things: 1) If you are 100% sure that they used a stolen credit card, you need to go to the police.

Sometimes it’s an expired card or a stolen card.

Anything in Detroit Proper, other than select neighborhoods is a waste of money (my opinion only) b/c they will be vandalized, copper stolen, etc. 

Pipes, ovens, etc, often get stolen.- REO sellers typically are unwilling to negotiate repairs or anything else.

I was also advised that leaving the property empty for any period (seems a possibility during an eviction process) runs the risk of copper pipes etc being stolen in this area.What would you suggest?  

Here's a list that totaled to this year alone being 35K and growing worth of repairs:1) Replaced both furnaces from tenant damages 2 times.2) Replaced stolen AC units from previous seller stealing them.3) Repaired duct work in multiple locations from previous owner improper installation plus wear and tear.3) During covid I went through 3 property managers because they refused to evict a tenant that ultimately didn't pay rent for 6 months and cost us over 10k in unit turns.

Guns get stolen from cars and the media asks the police, what can people do to stop this.