I think I'm going to build up a good long-range explorer - a Cobra, or maybe eventually an Asp when funds allow - but that's going to be funded by running a tramp trade route in a Type 6.
I've found some good complementary missions around the Tau Bootis area. There's High Tech world at Wolf 497 (?) Industry at Tau Bootis, and a good source of Tea and Coffee over at Hadad. I need to add a good Extraction and Refinery economy, but once I have I'll cycle around this loop with a hold full of commodities (tea, coffee, bertrandite, gold, auto fabricators, robotics, etc) and sell them to anybody who'll pay over the odds.
Then, when I get bored of trading for a while, I spend the profits on some Cobra upgrades (Wolf had a Class 4A FSD in stock, for example) and shoot off on an exploratory mission. Get bored of that, and come home for some more trading....
Ultimately, might even leave the explorer out on the frontier, and shuttle back and forward in a souped up Sidewinder.
That, at least, is the plan.