Advice needed for stolen AC unit

[Dustin Karns]

I'm in need of some advice. I had a unit go vacant (eviction) on 4/5. I was advised by my management company to cage the AC unit and approved that on 4/6. But, the AC unit ended up being stolen before the cage was installed. I'm not sure when it was stolen, but it was noted on my owner portal on 4/13. So, it seems that my property was vacant and unsecured for 7 days.

I just got a make-ready estimate for the property, and replacing the AC unit is over $4,000. So, a few questions...

Is $4,000 a reasonable price for an AC unit? I've never had to replace one before.

Are there any other options (buying used or a window unit)?

Should my insurance cover this?

Should my management company hold some responsibility in this?

Some other helpful information:

The home value is about $65,000. Rent is about $675/month. And, the home is in Tennessee if that matters.

Any input would be greatly appreciated! Thanks!