A kayak rack mount can adhere to anywhere you have crossbars on your vehicle. This includes a ladder rack on a truck, or regular post market cross bars for your SUV/car.
This sturdy pair is 16 lbs. They can hold kayaks up to 36 inches wide and 75 lbs. Make sure you check the width of your kayak before ordering as an extra precaution. Realistically, this suits most of the kayaks available.
To tie down use the included straps once you set your water warrior in place. Right now for the price and quality of this pair, they’re hard to beat. One gripe people have is with the quality of the included straps.
You may want to purchase a pair of those separately. These alternative tie downs are highly rated.