dedicated orca is much better than using a freighter, if you can afford a freighter, get an orca, get a hulk and do it that way. although if your mining that much ore you probably will want a freighter if you want to move the minerals without having to do 100's of jumps in a orca.
i'm making quite a bit of isk from pos fuel blocks, mine ice, sell most of the topes, keep some and use the PI income to make blocks.. 9 planets i run on 2 accounts, mechanical parts, robotics, uranium, oxygen, coolant .. plus ice = lots of isk. 14k per unit, 40 units per run of the bp, PI is quite crap in highsec but its passive so if you make 250 or more robotics every 7 or 8 days you get about 10000 fuel blocks a week. comes to about 120m or so. most of that is passive.
mix it up a bit, mine enough ice for your weekly fuel blocks then do level 4s for a few days and you'll be raking it in. also noctis :P best 80m you can ever spend. 1 week of doing lvl 4's me and one corpie, in the end we had about 300m in salvage and 500m in t1 random shit, 1 week but that was all down to the noctis. some of the heavier lvl4's will give you 50-60m in salvage and loot. which takes about 1hr tops in a decent bs. if you mine ore and do lvl 4s you'll be supplementing your low ends with a teeny bit of high ends if you reprocess all the loot (keep the meta 4s ofc they sell just as good as t2 most of them).
2 cents