ok, when its a mod ive made myself, just new land creation and landscaping changes or land retexturing or placing more houses in cities etc etc, but the mod is big enough that for whatever reason the CS starts crashing when i try to save further mod making progress, i was wondering how the best way to handle that would be? do i start a second mod using the first mod as an esm and the second mod the esp to the first esm? what if i need to do this several more times to truly finish that mod? is there a limit on that? and is it possible to merge them all together? or is there a better way to avoid having to do multiple esm and esps and just bypass the CS crashing and have one really big mod file? suggestions?

thanks