First, CONGRATS on your plan...I like it and was in a similar position 5 years back...so far I am at 80 doors, about $10k in free cash flow per month and still have my W2 job...not ready to retire from all yet but on th right path.
Second, your route should be pretty easy: Find the right bank! I currently work with 4 banks and have 13 mortgages. The key is to FIND THE RIGHT BANK for you and for the property. For example: Triumph Bank will finance any deal I bring to them that has over 10 units and I put 20% down. They really dont want smaller properties (just not a fit for them). Resource Bank will do 25 year loans at about prime plus 1% with 5 year adjustments on ANY property within their geographic focus (far western IL small towns), with 20% down, but they will do mixed use, commercial, multi-unit and SFR. Bank of MO will do pretty much any property for me that I can show it cash flows in pretty much any state. Mr Cooper (mortgage company out of TX) will do a second home loan for me in literally any state, and each state can have a second home so my limit is 50 second homes through them, all 30 year fixed loans with 5-10% down. And finally First Midwest will do up to 10 loans for me, with 10% down fixed for 30 years but must be either SFR or under 4 units
Those are my examples of how I scaled all on my own...call different banks and ask them simply "What type of real estate loans are your focus" They all have their niche, you simply need to work through all the banks to find the ones that fit your lending needs the best