It works better with greater skills of enchanting/speech. I do that with enchanting 100 (all perks) and speech 100 (all perks but 1/5 in Haggling, better levels means better profit).

This is easy. Just learn Banish from any weapon who "Summoned daedra up to level x is sent back to Oblivion" and after start buying weapons (or stealing if you have a fence) (can be the cheap ones like a simple dagger), enchant using banish (also, you can use petty souls) (enchanting at master level could help as you can enchant with one more effect, I personally use the Drain Health) and sell them back to the NPC (or others if this NPC doesn't have money, which can happen frequently as you are getting money from him).
You shall make around 5~10x the money you've invested before (remember that your speech level and enchanting level can influence, so I don't recommend to use this as low level in any (or both) of these skills).
As I learned this after master level in both perks, I don't have most statistics, so I will post these that I've made:

Skyforge Steel Dagger at Skyforge (in Whiterun) (buying): 46 gold
Skyforge Steel Dagger (enchanted only with banish using lesser soul gem) (selling): 746 gold

So, as you can see I made 700 gold just for enchanting this. A filled lesser soul gem costs 146 in Farengar (court mage at Whiterun) but you can find these killing dwarven machines (especially the spiders) or stealing/buying not filled ones (46 gold) (OMG, 46 again ) and filling them by yourselves (in a little walk into skyrim killing some low level monsters you can fill 5~10 of these or even more).

Have fun!

Alchemy.

Vampire dust + something else thats common = 1000+ gold invisibility potion.

Fully enchanted set of fortify barter gear, and I get great prices from every merchant. Buy the rest of the ingredients stock, wash, rinse, repeat, and I have a steady supply of materials.

Stockpile Glowing Mushrooms, Sabre Cat Teeth, Snowberries, and Spriggan Sap, and use those to craft fortify enchant and fortify smithing potions (which are then used to craft better fortify alchemy gear).

Realize theres nothing to actually spend this money on.

I was using Turn Undead and absorb health both gave me the best return i yet to find banish but damn sure will be on the look out. Vampire dust seems I need to farm me some vamps asap lol.

Side note any NPC's actually that can afford this stuff???

That's easy thanks but I don't need money.