In what way is it simpler? Using this solenoid relay would require just a couple wires. And it's cheap. https://www.amazon.com/gp/product/B00KGID0X0
http://www.samsclub.com/sams/duracell-agm-deep-cycle-marine-and-rv-battery-group-size-31dtmagm/prod3590232.ip?navAction=push looking at this one, or any of the others at sams club
also, i decided to purchase the components myself, I ordered a solenoid, http://www.amazon.com/Electrical-Spl6007-Solenoid-Marine-Winch/dp/B00KGID0X0?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
some fuse spade terminals http://www.amazon.com/gp/product/B00H39XW38/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00H39XW38&linkCode=as2&tag=7hg55aq2s58-20&linkId=SJ4MF4YWBKC76X6A
and a circuit breaker http://www.amazon.com/CURT-58360-Universal-Circuit-Breaker/dp/B001GN1LQ2?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
I figured that once those come in i can go to the local retail store to grab some wire and whatnot, in the meantime i'm trying to figure out what battery and inverter i need.
so i have in mind the battery i posted up top of this comment, and for an inverter -
do you think those would work together?