Slightly different, I was bountyhunting in my Viper until I could afford the T6, all the while my Multipurpose Cobra (the first ship I equipped to the fullest) stored away safely. Using the Cobra for doing missions, the Viper for pure Combat and the Type-6 for Rare Trades, until I can afford a fully equipped ASP + rebuy/running costs/insurance + cargo ... so, not under 30mill
Here's my Type-6 ... http://www.edshipyard.com/#/L=30W,5QH5QH0mI0mI01Q,2-4s6k6Q3S5K3m6k,08c08c0720727Q44xo2UI
Agressive interdictions get chaffed until FSD cooled down.
Fuel scoop to reduce running costs.
Advanced Discovery Scanner for small profits getting data on the fly
On my rares roundtrip I fill the cargo space with un-rare commodities for extra profits (20-100k, unused cargo space is wasted cargo space), often jumping into unknown systems doing a quick system scan and scanning the star while fuel-scooping. That brings additional 30k credits when selling the data. It's not the fastest roundtrip, but diversified and not that boring. And each roundtrip (around 2h) nets a good 2-2.5mill profit.