I have a large privet lender willing to become my bank but I don’t know where to start.

So I am 25 and have closed my first deal 6 months ago and in contract on my first duplex. I am loving it and desire to set my family up for financial success because I am actually a college minister. I desire to continue to buy more investments but I am not swimming in cash. My dad and I have partnered on these deals and are moving forward.

Here is the kicker this large privet lender who is interested is also my dad. He has done very well in his line of work and has retired and has a lot of cash. He has even mentioned he is interested in being my bank, so ever since I herd that I have been trying to research how he can do this to his benefit, and I am also hoping to be able to put low to no money down.

What I am hoping is that some folks would be able to point me in some direction of to what to read or where I can learn, and let me know if this situation is impossible or workable.