follow_along_with_video_below_to_see_how_to_install_our_site_as_web_app
Note: this_feature_currently_requires_accessing_site_using_safari
As far as the axle cost, I went with a 5200lb axle (the up-charge from 3500lb was something like $60), parking brakes, electric brakes, and it was $416 all in.