@Rick BaggenstossI think you are correct but for that area I'm thinking more of the short term leases like you mentioned to professionals in the film industry, companies near the airport, etc. 1, 3, and 6 month fully furnished leases.

China Grade Loop and in between Airport Dr. and N.

The adjacent townhomes are selling for $900K so there's definitely room to grow. 

If your tree is in good health, you have no knowledge that it was unhealthy, and it damages an adjacent property; then it is not your issue. 

Regular landscaping/yard care (mowing, edging, trimming, fertilizer, weed control) will be provided by ____(check one)____ [   ] Landlord  [   ]  Tenant .For all Tenants:a.Tenant agrees to keep yards, walkways, patios and decks clear and to keep premises free of junk and debris.b.Tenant accepts liability for all landscape damage and/or replacement of such, if caused by neglect, abuse or lack of water.c.Tenant may plant the beds adjacent to their dwelling to their liking, but only with those plants that are of appropriate size and type for the beds.All plants brought or caused to be brought to the property by Tenant will be cared for by Tenant.d.Tenant agrees not to cut or prune trees, hedges and shrubs.This will be Landlord’s responsibility.e.Tenant agrees to properly dispose of all plant debris and agrees to not leave such on the property.f.Landlord will consider special Tenant requests for planting and removal of plants, shrubbery and trees, but reserves the right to determine the make-up of the landscaping.g.Tenant agrees not to grow marijuana on the premises, indoors or outdoors.For Tenants of single family homes only: a.Tenant agrees to mow, water, and keep the grass, lawn, flowers and shrubbery thereon in good order and condition, applying fertilizers and weed retardant as needed. b.If Tenant fails to keep the landscaping in good order and to follow these guidelines, Landlord reserves the right to hire a landscaping service at Tenant’s expense (after a 10-day notice to perform covenant).c.Landlord reserves the right to restore the landscaping to its initial condition, as it was at the time Tenant began occupancy, or if improved during Tenant’s occupancy, to the level of such improvement.

The property is a duplex, located on the adjacent street from my property, and he’s looking to add an in-law/third unit to the basement.

I was interested in a super-skinny strip of land adjacent to property I currently own, but there were MANY liens against it because it was owned by Brandon Barber, who'd gone to jail for misc. property development misdeeds. 

Since it is adjacent to your property, you might have to be willing to pay above "market value" to keep it.

Plus it's still only a 30-ish minute drive to Phoenix airport. 

I personally love 90047, not the whole zip, but certain pockets that are Inglewood adjacent are great.