Dont bother updating so much, you may be destroying a solid antique.

Way too many contractors on a major rehab just assume any part of the landscape can be destroyed.

I do not want to spend the money if tenants are just going to destroy it.  

Either he or she or they, probably him, got mad and took it out on the property, if you knew about it sometime ago, you should have terminated the lease, committing a crime or assault or having a lover's spat isn't a free card to destroy the property anywhere.

Also you might want to meet the pet before letting them move in with it to see if you think it might destroy the house or not, or annoy the neighbors.

Even if you do get him to say yes, the very first hick-up will cause a rift between you that could destroy the relationship.

A week after they destroy everything they will complain there are no jobs. 

The more they think you may help them, the better chance they will not destroy the place. 

Arguably, we are the only major city in the U.S. that has intentionally destroyed our urban core by doing all possible to move business out to the suburbs.

If they fail to maintain the landscaping they should not be surprised when they get charged for replacing the landscaping if they destroy it.