In this situation we have a former-tenant  hyper sensitive to return of full security deposit (when unit wasn’t returned in good condition) and we are  experiencing a few unique damages.

A HELOC or home equity loan on your personal home could be a viable option to fund the rehab, but it's always a good idea to chat with a lender to explore all your options and find the best fit for your situation.

If I were in your shoes, I’d focus on house hacking in Phoenix by exploring multi-family properties or using the BRRRR strategy with undervalued single-family homes.

Dscr will be useful in the future for fixer uppers and unique buys. 

It’s great that you’ve already identified zip codes like 73128, 73170, and 73135; they all have unique advantages worth exploring.I agree with the earlier response—73170 and 73135 are solid picks.

I’m currently exploring real estate investment opportunities in Canada as an international investor.

It sounds like you’ve been doing some serious groundwork with all the reading and research, which is such a strong start to your journey toward FI and retiring by 55.It’s awesome that you’re exploring real estate as an option, even if you’re not completely sold on being a landlord yet.

Ideally you can provide something extra or unique that you can highlight in your photos and description to stand out. 

I'm exploring a few mentoring programs out there.

Are you exploring a conventional loan or a loan specifically designed for rentals?