Can anyone help provide a reliable target and/or range for annual property/landlord insurance premiums for a SFM, duplex, 3-plex, or 4-plex?

Your niche will evolve but the most important step is to identify what unique things you bring to the table, and then take action!

I get properties in all price ranges and conditions.  

The price range is a little wide for me to feel really comfortable.

A 2 bedroom apartment here ranges from $2200 to as high as $3,500 depending on the area.

We itemize under each category with specifics, here is an example from one of our move-outs:CREDITAmount held as Security Deposit: $800DEBIT Less Deductions for Missing Items: $3010 year lithium battery from smoke detector ($10)Seat cushion from kitchen bench ($20)Less Deductions for Damages: $170Patio – stain ($20)     Living Room – one broken window pane ($50)     Living Room – five inch spot on carpet from black sharpie pen ($50)     Living Room – one broken wand on blinds ($5)      Front Bedroom – one bent curtain rod ($5)Back Bedroom - door handle bent ($10)     Kitchen - cabinet drawer wood broken ($30)Less for Extra Cleaning $110Stove Top ($25)     Range Hood ($20)     Kitchen Sink ($20)     Ceiling Fan ($15)     Walls – extra cleaning of grime & pen marks ($10)     Floor Vents - debris in ducts ($10)     Outside Debris ($10)Less for Unpaid Utilities $12     Electric (changed by tenant too early, $12 for Nov 20 to Nov 30)[Credits $800 Less Debits $322 = $468]Total Due from Landlord to Tenant (Check Enclosed) $468

@Leigh C I would love to work with a mentor but the ones I've found in my area are out of my price range.

You can work with agents or investors locating distressed properties, motivated sellers, and any other range of creative ways to get leads. 

I have seen down payments ranging from 15-25% to get conventional financing on an investment property, really looking to put as little down as possible.

I have not picked a property yet I was checking to see what range of property i could afford based on cash flow.