Do what make you happy that is what it is all about, but......For head shaving, I do one pass and I throw it out. Pop in a new one and do my final pass. I only do 2 passes in total. I will save the 2nd pass blade for 1 more use as a 2nd pass blade before throwing it out. I shave my head everyday so I'm going through a lot of blades
I'm new to DE razors and I don't mind the cost of DE blades. I was paying anywhere from $15-20/month on cartridge blades before.
I also shave my head (almost) everyday and my cheeks and neck. I get at least 10 shaves out of almost any blade usually more. Your 1 days worth of blades could last me a month. As you said your still saving money, but you could be saving enough to buy a new soap or user grade vintage razor every month or 2.
Also IMHO, you're tossing the blades before they even get good.