Great write up.
My opinion has always been that it is just not worth the time, effort and potential mess to make DIY syrup.
My LHBS the whole CSI line, with the syrups costing only $5.95 p/lb. I get enough of a stink eye from my better half for brewing in the kitchen so the last thing I need is dangerous chemicals, sticky sugar, etc.
I made a Marshall 18w clone back in the day and when I was done I tally'd up the time, materials and effort and was disappointed because the production model was cheaper and sounded better.