Wood can be the least expensive option to go if you re on a budget.
Making a roof rack.
If you have factory roof racks that run from front to back you can build your own steel crossmembers using one inch square tubing cut to size and secured to the factory racks using carriage bolts.
The next accessory i made for the roof rack was a kayak rack.
An important decision can be choosing between steel aluminum and wood.
However steel and aluminum are more durable and stronger so they will last you a lot longer.
You ll need to do some welding and metal cutting for a homemade roof rack as well.
There are a variety of kayak roof racks on the market everything from j cradles stackers and saddle racks.
After checking through my supply of junk i found some brackets that are used to mount satellite dishes to roofs or walls.
Avoid drilling too deep into the roof of the car.