"TP" wrote
Insulated a new addition crawl space. Code only calls R10
(upstate NY). I see rolls of this white material used in new
home construction. 4'x50' rolls, white vinyl with fiberglass
against the CMU wall. I have also seen R19 un-faced fiberglass
up against CMU wall. The R19 (pink is a bit cheaper sq ft) than
the R10 vinyl faced. But what is the best way to insulate a
crawl space 5 CMU block in height?

Use those styrofoam shipping "peanuts". They are all OVER the place! You
could set up collection bins at various work places and go around and
collect them up once a week until you have enough to fill your crawlspace.
You'll insulate your home AND help the environment at the same time!