Well that is not so easy to be built I think. If you could make the whole propellers the same then you must consider the RPM for 4 motors (they must have the same RPM too).
If I was you and wanted to make something that just is considered to be HOVERed, I went and get some balas woods, put a low winding resistance motor (2 or 3 ohms) motor (a 4gr or 5gr, N20 or M20 is just fine), then get a GWS 2.5x1 prop( direct drive should be ok for an M20 or N20) and finally get a 3.6V lithium polymer cell (130mAh wich is less than 4gr for instance) and build this: