1. I would say just find the best gear you can buy at your lvl that will be interchangable. A question that I have for you is: You should have plenty of room in your moghouse for 1 jobs equipment, while you are wearing the other, why are you running into storage problems?
2. Do the moghouse quests! (requires you to build fame in home city)
3. Do the gobbie bag quests! (requires fame in jeuno, can be built in selbina easily)
4. Buy furniture that provides more than one storage slot.
They are there for a reason and if you have too much junk in your moghouse then you either need to do these quests or sell some of your junk. Before you start asking how do you build fame or how do you do the quests - Search the web, that's what everyone else does
Good luck and happy hunting