If you don't own a primary residence I'd start there.

Would a HELOC or home equity loan on my personal home be a good idea to fund this?  

Multifamily is considered residential since people reside in the structure. it's part of contractors license law, our testing is on it and violating can and will result in punitive actions.

If you are going to be doing the rehab work in exchange for equity then that value needs to be determined up front with a specific timeline that you have to adhere to in order to earn your equity.

Investment Info:Single-family residence buy & hold investment.

I just bought my first investment march of last year I gain over 50k in equity  .

This experience can help you scale your portfolio over the next few years- Local properties appreciate faster, which allows investors to reinvest their equity into more local multifamily units OR other markets where the cost per unit is lower (i.e., Philly, Upstate NY, etc.)The Bronx is arguably the best borough to consider the househack strategy.

Your lease probably specifies the residents must comply with "quiet enjoyment" of the property. 

Investment Info:Single-family residence fix & flip investment.

To attract a partner, create a strong pitch deck, structure an appealing equity split, and build trust before making your ask.Good luck!