I told her that I need proof of liquid funds sufficient to cover 25% of the purchase price and to provide proof of that.  

We have both always been interested in forming some partnership in which I do the leg-work and he provides the finances.

When you build a good relationship with a good turn key provider, they can help you find the best deal and best vendors to work on that deal.

We offer a unique, tailored experience, providing actionable strategies that are relevant to your specific goals, whether you're just starting out or already managing a multi-million dollar portfolio.

I can provide support of checking in on contractors, staging rental properties, walk potential leads to give you an idea of the property in person or what the area is like, meeting with agents, and drafting scope of work for projects. 

Consider an accessory dwelling unit (ADU): If your property allows for it, building an ADU (like a small apartment or guest house) can provide a separate rental unit while you live in the main house.2.

I am curious to see how it goes and will provide an update when it's completed. 

My conclusion is that take the provided ROI calculations from REI as purely estimates.

Best bet would be a “partnership” with a monied individual looking for a high risk/high return passive investment with you providing the “active” part.  

The struggle comes when you plan to sell, pay close attention to how the bank would treat the loan in the event you would sell.Even though its a bit more work, banks are typically open to these loans as it provides them with additional collateral in the event of default.