Could you elaborate what a resident benefit is or 2nd nature?

Along with some other benefits. 

I currently own 1
property as tenants in common with 5 other owners. I own the majority (~54%).
We only have 1 tenant now.

We are doing a
renovation of the existing duplex and building an ADU complex, Once finis...

House hacking with MTRs (30+ day stays) offers solid tax benefits, depreciation, pro-rata deductions, and no self-employment tax, but lacks the aggressive STR loophole advantages.Key Tax Differences:MTRs are passive (Schedule E); losses can’t offset W-2 income unless you qualify as a Real Estate Professional (REP).STRs (<7 days) allow losses to offset W-2 income if you materially participate, even without REP status.MTRs face fewer IRS red flags, and you still benefit from depreciation and deductions.MTR house hacking is tax-efficient but less powerful than STRs for offsetting active income unless REP rules are met.

.,  We do not do it, as we researched it and found no added benefit - I have yet to find a company doing this that actually has a positive P&L statement. 

You would benefit off all my skills and determination to be great. and I would benefit from your capital because I live in Hawaii and it it's extremely difficult to save capital 

Trying to figure out how to structure a partnership, how to split profit but mainly how to finance and share tax benefits.

Quote from @Christina Galdieri:You're exactly right, qualifying without using personal income is the main benefit of a DSCR loan.

If you are a high income earner, the loss doesn’t really benefit you. 

Work with a real estate CPA to handle depreciation, cost seg, and proper allocation of tax benefits.