I think the point we are trying to make is that you should not be needing to distribute patches.
As Uzuki said, make a decent chunk of the game and then give it to your testers. No tester can adequately test a game in micro portions. A tester needs to be able to see how things flow together (or fail to do so), how it feels to work your way through a whole dungeon, not just half a map which is constantly being updated so all your previous testing was a waste of time because things have changed.
Also, unless your testers are working full time on this, all those micro patches will just sit there waiting to be downloaded possibly for hours, maybe for a day or two. So why bother? Also, if you are sending this out in small doses, it means that you yourself will not have been able to do proper play throughs. No one should ever send a game out to others that they have not thoroughly tested for themselves. If you have been doing your own necessary testing, then you should not be needing to do lots of patches for your testers.