Honestly look for deals on Oregon chain online. I paid ten bucks for a used rental 72dl Stihl chain that was also a safety chain, which ended up as a meh deal. I also got the same chain in Oregon exl (much better than Stihl safety chain) brand new for 16.25 on Amazon. I’m kinda a cheapskate but I haven’t found any Chinese chains that were cheap enough to surpass the value on Oregon.
Check eBay too, I’ve found good deals on chain bundles there. In 3/8 I have bought loops of new Oregon and new Husky chain for less than it would cost to make it yourself.
I cut a lot of dirty wood myself and I just started to sharpen my chains more often instead of buying semi chisel or carbide. No experience with carbide but I have found that if my wood is really dirty I have to sharpen after one tank whether it’s semi or full chisel. And I figured if I’m sharpening that much I ought to cut faster at least. Just my personal observations. My logs come from a lot made of road millings before I get them so I’m fighting pretty abrasive stuff.