Highest number of units without getting into commercial buidling codes at 4 units you have additional engineering requirements. 

For comparison, I just completed two new build duplexes in a flood sone in central Houston using a builder for these and my Hard + Soft costs were $149/ft. the only additional cost to factor in was the land.

In addition, a strong property management company will tackle all aspects of marketing, application, ensuring resident satisfaction, fair housing, handling late payment/evictions, renewals, etc. 

.- Access to funds: I could consider a cash-out refinance or a HELOC to access funds for additional investments.- which property would you recommended me to keep? 

.✅ House Hacking – How to Live for Free While Building WealthHouse hacking is where you buy a property with multiple units, live in one, and rent out the others to cover your mortgage or generate additional income.

Bringing in a partner, second mortgages, line of credit are sources of additional funding to close. 

Successful flippers are:- Building relationships with reliable contractors- Ordering materials well in advance- Being strategic about which renovations will truly deliver ROI Regulatory EnvironmentRecent changes to Phoenix building codes have emphasized:- Stricter energy efficiency requirements- More rigorous inspection processes- Additional permits for certain types of renovationsBe prepared for longer permitting timelines than in years past.Financial ConsiderationsThe financing landscape has evolved significantly:- Hard money lenders are offering more competitive rates (7-9%) than the 12-14% seen in 2022- Several Phoenix-specific investment groups have emerged that pool resources for flips- Traditional lenders now offer more renovation loan products tailored specifically to the Arizona marketThe Bottom LineThe Phoenix market in 2025 offers solid opportunity for house flippers who approach projects strategically.

Additionally, while rates aren't historically bad right now, they are higher than 4-5 years ago, and they will be even higher for you as an investor than they were as an owner occupant, which is what you were when you bought originally.I get that you are anxious to add to your portfolio, but that could be achieved without touching your first golden goose.Sometimes on BP, the push is to leverage every last spare penny, but that can be a risky game as the markets shift. 

Required insurance certificates naming you personally as additional insured? 

Additionally, understanding the rights and responsibilities of both tenants and landlords under this program can foster better communication and smoother interactions.