Well, physics is difficult to cheat at. You got aero and rolling resistance to deal with. Most of the mods we are mentioned are a combination of the 2. Do the hybrid kits really skirt those laws, who knows? I think it would take a while to get the pay back not to mention break even with the cheaper fuel prices around.
I got a phev kit for my honda and it paid for itself in 17 months. Now at 22 months I started to have problems and quit using it for fear of further damaging it.
If you got to regularly move 4400 lbs around have you considered contracting it out to let someone else deal with the logistics? Get a courier, freighter or just shipping it? Ive purchased big heavy items across several states and its just cheaper to have it sent vs drive there, drive back and expenses like food and missing time at my day job.
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