This will set up your buy and hold business long term. 

Meet with a local banker & schedule a time to talk with a mortgage broker, they'll give you at least a baseline of what kind of down payment options and rates are out there.After that, if you're still wanting to research more creative options, do some looking into seller financing (a very hot topic with good, and bad, advice out there), look into private lenders, and commercial financing options.If you're wanting to live in 1/4 of your quadplex, then conventional residential loans may in fact be your best option as you can purchase that with a fannie/freddy loan with very low down, and use up to 75% of the income from the property toward your own income. 

And personal downsizing is always good for business!

Very unlikely unless you find a private lender/individual to do this as a one-off. 

We know that investing in real estate means building a business that incorporates the right investment strategy, tax & legal plan, financing, retirement planning, insurance & estate planning. 

That’s how the wealthy do it with real estate or businesses.

Line Item Fee Collected Rents 10% of All Collected Rents New Tenant Search & Onboarding $500 Business Hour Service Calls $80/hour + Materials Cost + Tax After Hour Service Calls $110/hour + Materials Cost + Tax HVAC Cleaning & InspectionGutter CleaningSpring/Fall Exterior CleanupSeasonal Mowing & Weed TrimmingSeasonal Snow PlowingGeneral Contractor Vendor Cost + 10% Oversight Fee

If you are using STR, REPS, or self rental with material participation to convert to active or nonpassive income, you do not have to do this if you have passive business invesment that produce passive income that will exceed the loss generated by depreciation.

Im old school...my cpa is in the building next door and I like doing business face to face.

As in any area of real estate investing, it's best to know your niche and the areas you're wanting to do business in.