Quote from @Noah Laker: I'm a local broker and investor, and manage 100+ Airbnb properties for clients.

All that being said I don't know about if a salt hot tub is better per se, I know it's better for your skin and I'd say perhaps if you're in a very health conscious area like Joshua Tree, some folks might be attracted to the idea of a salt water hot tub.

Any way to capitalize on this garage outside of just attracting higher rents once I move out and/or higher sales price if I decide to sell?

Yep check BP and Meetup.com or Eventbrite for local meetups @Baron Wheeler

If the interest rate is still a barrier, you could explore adjusting your deal structure or negotiating with the seller to see if there is any flexibility on the price or terms to make the deal more attractive for buyers.Overall, while the interest rate may make it more challenging, it’s not impossible to work through.

You might want to look up the pool requirements for Phoenix and Scottsdale AZ if you want to be the safest you can be, despite the lax laws in other localities. 

Most people that have a hard time finding PCF are looking in local areas, because it's local...or more or less local.

We get granite for around $40/ft installed from a local shop. 

We bought a property that we feel is assessed by the our local government too high.

@Jack Cottrell You Vacancy & Maintenance percentage are aggressive and may only work for a Class A rental/tenant.If the is a Class B or C rental that will attract Class B or C tenants, you should strongly consider increasing those percentages.NOTE: we deal with a LOT of Class B & C rentals, so we replace "Vacancy" with "Vacancy/Tenant Nonperformance".