3 maps, especially completely different maps, would take some time. For me, that's A LOT of work as I'm the only dedicated texture artist and we only have a couple coders. If you wanted, say Bespin, Endor and Death Star (not that these are the maps we are set on releasing first) I would say it would take us another 4 months, easily. If you wanted 2 maps, the time significantly decreases. And finally 1 map, the time might even be closer to a weeks.
Note, I'm not promising anything relating to a release date, and the maps I used were for example only, I'm just trying to say that it's easy to say how many maps you want, but you have to realize that these things take a lot of time, and we are doing this in our spare time.
We don't have EA breathing down our necks telling us to release a buggy product. We are going to do this right, and make something that people will enjoy.