Ok, my reccomendation for mobile mining ship:
Power. As has been stated, you could use a centralised power system, transmitting the charged cells/batteries across. Or anything that runs on a frame ship (nukes, geos, fuel systems, anything of that kind).
Navigation. Really, you're not going to do this precisely without computers, and CC has the GPS system inbuilt (you can set up an auto-deployer to set up the GPS when it needs to).
Collisions. With something that unwieldy, you really need to move through, rather than over. You could set up a turtle to clear the way, or block breakers. I do remember a previous version of MFFS had an attachment to clear blocks that would be taken by fields. This, toggled every cycle would do the job.