waterproof electric setup

[jackeltrader]

Hi i was wondering if you could help i am looking to get a 1/8th scale 4wd off road buggy but want to get a full waterproof electric setup if possible!? I have seen that hobbywing do a combo( COMBO-SC-C4) which looks like it might be suitable, could you give me any pointers or recomendations, i dont have huge budget due to buying cells/charger etc. I use HW gear in all my 1/10th cars & its all been great.
Any help & advice would be great!
Thanks,
Craig