Tower racks and bed covers

I have been told that to get a tower rack for kayaks to mount over the bed and cab that if I also want a bed cover then I have to get a re-trax or rollnlock, both of which are super expensive. Are there any other options, or is this a must since they have their own rail system.

 

We have racks that will work with a ton of different covers, not just the ones mentioned: https://www.max-modular.com/toyota-tacoma-years-2005-to-present

 

This company makes one but you have to drill. No experience or use with it. https://www.agricover.com/truck-bed-racks/