I've just gone through this myself and decided on this product:

https://www.costco.ca/ultralock-black-and-grey-solid-garage-tiles.product.100352733.html

The closest comparison I could find, in the US, to the above was this product:

https://www.homedepot.com/p/Husky-1...-Flooring-Tile-6-Pack-HDTRP6DG/312535726

I watched several YouTube videos on professionally done epoxy floor coatings compared to what Rustoleum showed for their kits and I could see why there was a difference.

My cost for the Ultralock tiles to cover a 1,200 sq ft shop was just over $5,000 CDN. Costco Canada offers free shipping so that was the deciding factor for me.

I knew having the epoxy professionally done was going to cost more based on what others told me so I didn't bother asking for a quote.

Let us know how it works out for you.

Mike.