Just a few hours a week, it could take quite awhile. Now, a few hours a day (to at least one hour a day) is pretty good, assuming you don't get quester's block, or you don't get bored putting it together. But if that's the case, Just go play one of the many quests out there. If you need a good one, use
www.purezc.com , as
www.zeldaclassic.com is currently seeing some fixing up. Sometimes, you'll be able to download ZC from the latter site... sometimes...
...but this thread is a more reliable source for now.
http://www.purezc.com/forums/index.php?showtopic=30502the Windows 2.10.2 is a rerelease of 2.10, and is primarily a bugfix. For a standard version to play quests on, this is very good to use. Keep in mind though, this is only recommended for 2.10 quests. if you want to play quests made for another version, be sure to get that version. (for that, you'll have to pray that Zeldaclassic.com works for you.)
As far as quests go, purezc.com is your only real bet right now. the quest database at zeldaclassic.com is virtually impossible to browse in it's current state, but that will change, hopefully, as some quests can only be found there.