@Mike53
1) I suppose we are a very close age. Maybe I'am a little older,so
"Even the old dog can learn new tricks"
I cannot imagine me trying to learn other software
If I can, You can!
2)
try to find a different handle for them the size (weight) grows about 10x by using the ones i have
You can try but as far as I know You don't find it. That's why I "learn" a little bit AOI and other.
3) You've right about size. But You have to make a compromise between size and quality.
I've extract Your knob as object and this are the extreme:

Left 6.2K and right 233.3k as original.
Few information of what is behind:

You can see the numbers of triangles in original and after optimization of tow pieces which compose Your knob.
So, for me, I opted for a compromise at 113.9k which look like that:

4) If You use it for a pretty regular home is not a problem the size but for a hotel it is [:D]
5) I've started to simplify my furniture; I don't have a hotel but i have a poor computer so I need also to reduce the size everywhere I can.
If You think I can help You I'm available; just ask.
Dorin, a old man (very old for today generation, (clik-generation or tap-generation)) [>-)]