EZGO Upgrades-Costa Rica export-Hybrid conditions

[scanr]

I never owned a golf cart but driven a lot. Purchased both Stock 2016 EZGO L6 & 2014 S4. Need to be converted to street legal. Very hilly w/extreme angles. Most driving on road, (a little on beach hard pack) but many large speed bumps! So I need off-road capabilities for on road situation. I would like to lift, (how high?) but not extreme to increase roll over possibility. I would like to upgrade engine performance (with stock items) but would consider swapping for higher HP Honda. More important to upgrade brakes, if feasible. Would be nice if swappable parts available to increase performance.
No top yet on L6. How long do I specify to completely cover rear facing seat/passengers? Is there any stock roll bar to install instead of standard supports??
It rains a lot here! Any suggestions for full rain covers and seat belts? I also require seat belts.
These carts will be used to also promote business, so they need to look good and catch a few eyes. Any stock lighting harnesses for off road LED or back-up lights? I realize I am asking a lot, being so new. But trying to live the dream with my mid-life crises reliever fantasy!

[scanr]

Did I post this in the wrong place?