If you have the nice towing cover $$$$, you probably don’t want to ruin it out in the sun and weather every day. Besides, the tow cover fits so tight, it would be more difficult to put on.
Since you just want to keep sun and rain off of the boat, a less expensive “Basspro” cover would suffice. It can be a little looser than the tow cover, hence easier to install/remove.
I use a slightly larger cover from another boat for my Boat Lift boat.
Just a thought