The only thing I dont feel is important that the OP stated is arrow crafting. Unless he can be more specific as to what you craft, I dont see it as a big issue. There isnt much you can craft for an arrow? Its just a stick with a point and feathers, what else can you do with it? I mean, I wouldnt mind being able to poison arrows, but you can apply a poison ability on a bow....
But craftable arrows
would be useful.
1. Money-sink: Use up your ingots of ebony, malachite, etc. Use the chopped wood that otherwise is pointless after you start using craftable bows. Hagraven feathers. This is totally doable and makes perfect sense in a wold that requires you to make other items. And the arrows should weigh the same as small potions; 100 arrows should weigh at least a couple pounds. They do in real life.
2. Enchant them to do extra effects--isn't that why I put Archery buffs on my equips? Seriously, I would much rather enchant the arrows themselves with a +damage buff, so that I can free-up the already
severely limited items that can be enchanted. We used to have multiple pieces of clothing, now one-piece. Multiple rings, now one. Etc. Sorry, but I miss the extra enchantable items from Oblivion. (Heck, I want
10 rings! We have 10 fingers and have that option in real life... Like an adventurer is only going to wear ONE enchanted ring. Seriously.)
On the note mentioned earlier about septims weighing something--this is totally reasonable. Same as arrows, potions. Like .1 pound. If a bank system was implemented, only looted septims would ever be an issue; and there are hardly any in dungeons, anyway. Some NPCs have a few hundred when they die, big deal. Any shops/NPCs rewarding/buying/selling would just transfer the coins from their bank account into yours. Then you have realism, accessibility, etc. The bank could charge a 1% management fee, the coins would be 100% safe there. House safes would be 90% safe. Chests able to be robbed, etc. If you want to buy a $25,000 house (which should cost more honestly considering the supply/demand ratio), you make a bank transfer to the person you are purchasing it from, which is removed from your bank account upon entering the purchased house for the first time. Its called Escrow! If we can figure this out in real life, its transferable to the game. Its why banks were invented: gold IS heavy.