If you want to 10's to push like 4 12's you idea of lightweight has gone out the window.
You would have to be running to high powered 10 woofers. Something around the 1000 watt rms range
then you will have to have the amp to push them
both item are going to be fairly large and heavy not to mention the correct enclosure for woofers that size
Then you would have to get a new alternator to push the entire system cuz the little honda opne is not going to do the job.
Maybe you might want to stick with three lower powered 10 and not worry about the 4 12 thing.
Cuz if money is no object your idea is going to make it an object quickly