So if this is the first floor:
...this would be the first pass at the second floor:
Very basic first sketch. The only real thought that I put into the second floor was stacking water/sewer stuff above existing stuff on the first floor. I also figure that if it's pretty big on the second floor that a second floor den above the family room could work so that you're not putting a bedroom right above the noisy family / TV area.
The issue is, however, that this looks like a lot more finished area than I'm wanting. Granted it's not to scale and I don't have even ballpark dimensions to work with, but I think that by having a full sized second floor (best bang for the buck according to my builder) with a main floor master that you really end up with a lot of space. Granted I think the kitchen and family room are skewed way bigger than they should be compared to the master bedroom, but still.
That would net this sketch as a 4br 3.5ba two story with closer to 3k sq-ft I think. Really would need to put more thought and dimensions into it. Could possibly leave the bed/bath above the master suite as unfinished storage with rough-in for bath stuff.