Advice On New Electric Longboard Build

First time Building an electric skateboard, so I would like to know what could be changed with the list below... Here is my parts list.

Single motor mechanical kit DIY Electric Longboard - DIY Electric Skateboard ... nical-kit/
(For ease of assembly. I don't want to scavenge around for the rights parts.)
6364-213kv motor https://hobbyking.com/en_us/turnigy-aer ... motor.html
(I believe I want to get a higher kv rated motor probably 260.)
VESC speed controller DIY Electric Longboard - DIY Electric Skateboard ... board-esc/
(I don't know if this is the best VESC for my setup)
servo connector for VESC DIY Electric Longboard - DIY Electric Skateboard ... connector/
2.4 ghz remote DIY Electric Longboard - DIY Electric Skateboard ... ontroller/
6s 25c LiPo battery http://hobbyking.com/en_us/zippy-compa ... -pack.html
(This battery doesn't have a BMS, so I will not be getting now)

My first question is with the battery: The one I chose doesn't have a BMS, so I would like to get a good battery with a BMS that will work well with the motor I get.
My second question is with the motor: should I get a 260 kv motor. I need it for semi-steep hills. If I do Imagine Ill need a different battery probably 8s.

Besides that, any modifications or tips would be appreciated