Use money to make more money? then when you have more money use it to make a lot of money? then upgrade the Ninveah to a mom? jus'sayin'Sigh. It would be the responsible thing to do. Even if I don't go for a Wyvern so I'm not trapped in a Mothership all the time, I could build up a nice bank account in case I ever need to purchase the Ninveah II. And I do have a lot of ships in my hanger already.
I've done commodities trading on a small scale (i.e. in the hundreds of millions) before and made a nice little profit at it. I think its time I tried it again on a larger scale and see if I can't turn my ISK into something more formidable.
But I'll do that after I setup my new ships.