I have a referral I can send you, I recommend going with an individual with experience in co living rather than a traditional company who doesn't really understand the model.

@Jordyn Ohs Suggest you run a financial model and assume 100% vacancy.

Not if you buy the worst lot with the slowest selling model.

However, if i would take 100k home equity on a rental A (ex. 100k) and use 50k each (same as above) for 2 rentals (B & C).

They seem to be trying to use a PMC model designed for Class A properties/tenants for Class B, C and sometimes D.Can't use the same business model for all classes of properties/tenants. 

Plus STRs are not the model for me.

With my own portfolio I generally underwrite with 10% for repairs, 10% for cap ex, 5 percent for vacancy. 

I’m looking to access some of the equity in the home to buy out my ex-partner, and my goal is to either convert the house into a multifamily property or add a dwelling unit (ADU).I’d love to hear any advice from the community on the best way to approach this, particularly in terms of financing options, legal considerations, or any similar projects you've completed.

Also, I'm a civil engineering expert in Building Information Modeling.

I'm assuming you are arriving at your cash flow number by applying Gross income - cap ex, maintenance, utilities, vacancy, tax, insurance, mgt, landscape/snow & Debt service?