I've no photos to add, but our tree is "eclectic"!
The first year, we had a few red and gold baubles from Primark, a reel of wired ribbon, a string of lights, and I think I got the tinsel that year too (it's still surviving but may be retired soon). We also got a few cheap individual decorations and I sewed a few tiny red and green felt stockings (I put bits of ribbon or beads on the front to decorate them).
I didn't think of it at the time, but I now have a few lovely pine cones that we had collected another year and decorated with paint and glitter that have lasted well.
I also have a few lovely paper ornaments - including a fan and a bird.
When DD was small, we cut a couple of egg cartons into individual "bells", painted them and stuck a ribbon through the top, and we even hung a clapper in them made of half a Q-tip with the cotton dipped in glitter (some were for selling at the school fair, but we kept a handful for our own tree).
We also have a family tradition of buying a Christmas ornament most years on our holidays or some travels (DH and I have to go abroad a lot for work), so we have memories from Paris, New York, Brazil, Orlando, South Africa, Austria, London, Galway, Canada and various other places when we open the boxes. Most of those were cheap (not quite all), but they were different to what we can get here.
If you are any bit crafty - whether knitting, sewing, crochet, papercraft, baker etc - there are loads of wonderful ideas on the web for homemade decorations and many of those don't cost a lot.
I think this year that original tree is going to go up again in the dining room and become the eclectic one (the purple dangling glass ornaments, the pink and orange robots, the yellow NYC taxi, the Newbridge silver, the white "string covered in pva and stuck into a birds nest effect then painted", and probably the coloured lights).
And the better pre-(soft white) lit tree that we splashed out on last year will go into the normal sitting room spot but more restrained and traditional red/green/gold themed and the glass ornaments.