Started doing the following
1. Buzz around home systems filling up my fighting Asp with 72 tonnes of rares.
2. At each system to fill up my allocation, fuel scoop @ 140 per second and hit the nav point until the cops turn nasty then move onto the next rare.
3. Browse forum waiting for the 10 min allocation max on rares.
4. After filling up, head off to my fav destination about 160 ly away and take a different route each time
5. Detail scan all new systems on route.
6. Cash in and buy a load of Palladium for the return trip.
About 10 leaps for me with my 19 Ly laden ranged in my fighting Asp.
Also noticed that distance gives no extra money for scanned systems.
No fuel bills and lasts about 3 hours for probably about 3 mil credits and a lot of fun doing 3 trades, bounty hunting, exploration and trading. Mixes the game / experience up for me. No point in grinding, will get very bored very quickly.