redid the roof and landscaping.

My suggestion would be to rent for a while to acquaint yourself with the Phoenix landscape. 

@Charles Mitchell Don't forget the RE attorney, Title person(s), Money people, contractors and mentors in the area to help you with the landscape.

Installed gutters and cleaned up the landscaping.

Installed gutters and cleaned up the landscaping.

Needs counter tops and a lot of exterior paint and landscaping.

My first thought, is all statistics aside, make an offer that fits your needs and your personal budget. 

I'm thinking of rehabbing the kitchen, new appliances, new flooring throughout the house, new landscaping, paint, new trim.

How much does landscaping maintenance run you?

The cliff notes for leasing the land to dweller are 1) they need a large enough flat space to put the unit with proper setbacks (about 26x45 I believe... typically in our area that requires a 5,000 square foot lot), 2) dweller will pay for the install including permitting and bringing in utilities but the owner has to remove any landscaping etc to prepare the site, 3) dweller has a land lease with the property owner that allows them to rent out the ADU (of which the property owner gets 30 percent of the monthly income (gross I believe)).