Congrats on the first property @Matthew Tally! I would definitely factor in the other expenses. Not sure what rental demand is like in your area and the quality of tenant, but those are important factors in estimating your expenses. I would use these figures as a starting point and make adjustments based on your area:
vacancy - 5%-10%
General Maintenance - 5%
Cap Ex - 5%? How old is the roof, major system:, hvac, electrical, hot water heaters?Windows updated? I try to address all of this into the figures before buying so no big surprises come along. If major expenses are on the horizon, you want to allocate more.
Lawn / Snow / Trash? :
Standard Rules of Thumb: 2% rule - you are at 1.15% (not bad or good, depends on other expenses) , 50% rule take 1150 - Principal Interest Payment only, to estimate whats left over
Assuming you will be managing yourself once you move out. If we take 15% of rent (2300) for above items = 345. Net CF = $247/month
You will be all in 18k , cash on cash return = 2964 / 18000 = 16% , 6 years to recoup investment. Plus you will be building equity, getting tax benefits, and hopefully some appreciation.
I would say they are acceptable #'s, but can be better or worse depending on the area the property is in and other factors not mentioned above. Hopefully this helps, and congratulations!