In the second year, your investment will be significantly smaller (cap ex, maintenance, management costs, utilities, etc) so your second year return will skyrocket. 

They have not been a maintenance issue for us. 

Can I carry forward the rental losses (like depreciation, maintenance expense, etc.)?

Some property owners really do keep costs down, if that is the case there will likely be a lot of deferred maintenance.

Our tenants are high maintenance but they keep the property nice.

10% management fee is about normal, the $100, is that for property maintenance ?

for me, in my rather high cap rate market of northeastern Pennsylvania, I can easily demonstrate 15 to 20% cash on cash or cap rate after 10% maintenance 10% management and 10% vacancy.

The $300 Cash flow from the new duplex is referring to net cash flow after all expenses (vacancy,mngt, Piti, maintenance, capex, marketing, utilities, etc...)I guess I was thinking if I decreased the expenses by $3300 I will would be increasing the value of the property by $33,000 ($3300/10% cap rate). 

For some there could be other fees like inspection fees or maintenance call fees, etc.

You will also want to get any insight you can on maintenance costs and weather or not the previous landlord has been doing good maintenance or just enough to get by?