Yeah, might be ok in that size of area.
Best thing to do, is a small site survey as well.. make sure that you are on the clearest channel, etc to get the best performance.
You can get a free program called inSSIDer.
Run this on a PC (or i think you can get it or adroid phone/tablets) hopefully one that has a dual card in it which does both the 2.4 and 5 ranges.
This will show ALL of the channels being used within range, of all other peoples wireless.
Then you can choose the most open/clear range, to get the least interfearance :D