Help with build of e-bmx

Hi guys.
I know, that certainly are you already solved problems about electric bmx but , i will be very glad if you help me with my build please.

One member of this forum told me that this bike kit have a verry narrow rim
http://leafbike.com/products/diy-bike-c ... t-986.html

But what if i use this bike kit, this kit have wide rim, what you thing?
http://leafbike.com/products/diy-bike-c ... -1098.html

I need even this freewheel
http://leafbike.com/products/electric-b ... g-933.html

and this Disc brake?
http://leafbike.com/products/electric-b ... 0-672.html

Content original front hub of bmx place for Disc brake or i need buy second front hub and pre-lace wheel?
http://leafbike.com/products/electric-b ... b-936.html

very thanks for your advices.

best regards.