Although you live in one of the units, you are treating the other like a business presumably and will be reporting income and expenses for tax purposes so you really should have a separate bank account.

I can track down a few property managers pretty quick and know some 40+ units for sale if you are looking that big (use reddfin). 

If you notice my posting history I am investigating purchasing my first condo in the next few months and am investigating some potential scenarios.I am looking into living in the unit for a little over 1 year and putting it up for rent either with HCV/Section 8 or finding a tenant through my brokerage(L&F) or other means. 

SFH is different than a 20 units, or industrial or commercial.

Are all the units vacant?

I recently was showing a vacant unit and one of the potential tenants said "Have you noticed any paranormal activity here?"

I just got wind of a 4 unit property that hasn't hit the market yet.

The down payment required is 25% per Fannie/Freddie rules for a 2-4 unit property.”This is from their seller agent.

I purchased 4 unit property in 2022.

Three Questions: Is it better to have 4 separate lease agreements (lease by the room) or to lease by the unit, which I would prefer?