I'm planning on building a pole barn style woodworking shop. It will be
somewhere between 24x36 to 30x40. The area where I want to place the
shop has a 1.5' slope from where the front of the shop will be to the
back. I'm wondering the best way to fix this.

I've considered pouring a footer around the perimeter and laying a block
foundation that will be used to hold the gravel/concrete.

I've also considered just installing the poles and level collars and
filling with gravel/concrete inside the collars.

Any suggestions?

Thanks
Reggie
Nashville, TN