Neighbors trees leaning heavily toward my rental, one already fell and damaged RV

[Jack B.]

Neighbor was contacted about trees leaning heavily toward house by tenant. Neighbor refused to cut trees down.

One tree fell on tenants RV, totaling it. Tenant had to claim against their own insurance. 

There are additional trees leaning heavily toward my other neighbors house and possibly could hit my house. Don’t want all of my insurance policies to go up or deal with the hassle due to this neighbors negligence.

Worth hiring a lawyer to send a demand letter? I want to hold the neighbor with the leaning trees to be held liable. Trees lean mostly to my other neighbors house though.