The local bank typically offers a 5-year fix either with a 15 year or 20-year amortization or 15-year fix with a 15-year amortization. 

Some aspects of the unit are nice, we have a lot of nice finishes and amenities to try and keep it a middle tier rental, but it still has a drop ceiling with tiles and flourescent lighting, short ceiling height, the bathroom is a bit small and cramped, typical small windows, the soundproofing is there but isn't perfect.

The units are in typical rental condition (Maybe slightly rougher).

."), I typically use $150/sf as my "ballpark" estimate for purposes of quick, back-of-the-envelope, math to decide whether a particular project warrants more detailed consideration.

How much would the cost run typically?

There certainly is a cost to the broker but a local/regional bank typically has a portfolio allocation limit that may limit what they can offer you no matter how good the property is. 

Typically, the down payment required gets bigger the more units you buy.Lastly, what are the cash reserves required on the property (duplex) I'm departing, and the next property I buy (I'll be aiming for a triplex)?

Is this a typical cost to get started?

Any legit contractor with proper experience, a decent rep,  a gc license and insurances can typically be approved.You absolutely want a Lender with plenty of 203k experience....they may give you a couple of contractor names they have approved, or not.

Are they typically taken out in their own name?