This edger is so cool, such a well thought out machine, well done.
I especially like because right out of high school some 25 years ago, I worked at a pretty sizable hardwood sawmill that actually had 2 edgers and boy oh boy watching those guys running those edgers was a sight as they were easily the hardest working guys on the line.
It was a busy spot when just keeping up with the resaw when running quarter sawn lumber, but switching to plain sawn they'd have boards coming from the resaw AND the head saw that's when they REALLY earned their money.
Now you need to build a chipper for dealing with the waste from the sawmill and the edger, and maybe a vibrating conveyor to feed the waste directly from them to the chipper
From reading through I saw your talk about the expense of timing belts and cogs so I thought I'd toss this little tidbit out there.
Copy machines and laser printers can be a source of 5mm-10mm timing belts and cogs. I bet there's a fairly local company that sells and services copy machines for businesses and a call to their service dept you might be find they've got access to affordable replacements and/or used pieces available. Also if there in an E-waste place around that accepts all manner of electronic scrap, you might be able to help them break down a few machines for free in exchange for belts and cogs for your use.
All else fails maybe a fellow member in the states can receive parts you order and then send them on to you, you'd still have postage involved but surely it wouldn't equal the "north of the border location expense"