I used to use the method for years as a Florida Private Banker for wealthier clients that were susceptible to law suits and could relatively easily pay off the line.

I recommend reaching out to Krista Debrine at Banker Exchange.

Purchase price: $150,000 Cash invested: $1,500 A month ago my banker (who's is also also an agent) from my home town where I have other properties called me and asked if I wanted to buy this house.

I live in Folsom and am a full-time agent with Coldwell Banker in EDH. 

It's hard to find bankers who have even heard of a series LLC.

Quote from @Stevan Stojakovic: Good resource to get started is The Banker's Code by George Antone.

Its somewhat like a RE license vis a vi a RE broker licenseyou need to start as an MLO  ( mortgage loan officers)  Before you can became a Mortgage Banker  as stated above you need to show experience. 

Financing-  build a relationship with a regional banker, don’t shop for interest rates, start small and build history and loyalty they are your team, Cross collateralize, deposit CD/MM or custodial account with bank for loan, give them monthly updates, nail your deal analysis, do stress tests on your deal analysis-cost/interest rate/deal length/ sale price etc. 12.  

These investors were looking for Passive income, but they didn’t realize they had to fill the role as an Investment banker and they didn’t have the skill set or systems to do that.  

I can tell you as a Banker it is much easier and you will get a lower rate if you do a cash out refinance versus a Heloc in this market.