Eh... food's pretty cheap though, even for the expensive stuff (deluxe ration, etc), and you can stick a pretty much unlimited amount into your mecha. I think I stuffed around 20-30 deluxe rations into my mecha and was able to get from spinner to spinner on the world map without much trouble.
EDIT: If the transit is causing a lot of trouble, though, you can always find yourself a light mecha frame, strip it down, and slap on as many arc jets/(s)flight jets/overchargers as you can. A speedy mecha cuts down travel time a fair bit. Just make sure to remember to 'R'un, heh. 'Course, that does mean you'd have to have your combat-mecha delivered to your new place, but I've fairly sure that's a bit cheaper than just taking the bus-thingy, so it might help.