How does your store price things? Like are all bulk rares a buck? This is a really neat idea and I like your mono green approach; I'm working on a build on how I would do it, but I have to know how your pricing works
Basic lands are free, yes; and to stop any confusion over pricing, "tcg says $1.75, mtggoldfish says $2.15", they base it on store costs. If it is a sought after card under the display case with a price on it at that store - that's the price. Other than that it's: $0.10, common; $0.25, uncommon; $1.00, rare/mythic.
The elephant and the khenra are both bulk rares, $7 total.
Blossoming Defense is $1 in the case, so $2 more takes us to $9
Longtusk cub is $0.50 in the case, so $2 more, up to $11
21 bulk uncommons at $0.25, $5.25, running total of $16.25
22 bulk commons at $0.10, $2.20, final total of $18.45
That counts the deserts as commons and sideboard.
For the deck you posted and asked about, all the rares but
rishkar, peema renegade would be bulk at my LGS, $2.50 each for the elf. None of the other cards would go over bulk pricing, looks like it would fit the budget rules or be close. Your strategy is definitely built for smashing! I like Rishkar'sexpertise a lot, good selection.
(EDIT: Math)