I'd go the seat cover route and see if that solves your problem.
Back in the day I used to ride in jeans. Some would wear out in the crotch, others wouldn't. I now commute in the morning in my cotton work pants. I've never worn out a pair due to riding in the work week. Get a seat cover, they're cheap. But now. In the aftn ride home I do wear cycling tights because they are more comfortable. In the summer I wear cotton shorts. I've never worn them out either.

Go to Aerotech and pick yourself out a nice looking seat cover. Assorted Lycra Spandex Bicycle Saddle Bike Seat Covers