I agree here. The installs are only between 3-6gigs or so depending on the mod you are using. I have Valmod,Ravenhearst,Starvation,vanilla,Undead Legacy and War of the Walkers myself and love playing them all.
When the size get's to be like some of the big AAA titles then it will start to suck haha. Hell ARK: Survival Evolved is like 120gigs installed with the DLC and crap and this game is way way better. I should be good for another 50 installs of 7DTD since I uninstalled ARK
Start with fresh base game install of 7DTD. Make a copy of it and call it Ravenhearst whatever mod your gonna use and make a new shortcut for it on your desktop using the 7DaysToDie_EAC.exe or the 7DaysToDie.exe version depending on what the mod calls for and always leave the vanilla folder alone as your base install for new mods.
To me this is easier then having to deal with the mod launcher and worrying about any kind of errors with overwriting mods.