TX Solar Cost Quote Price Check

I’ve submitted my quote for additional bids to energysage and am waiting on replies, but wanted to check here to see how my quote stacks up. Here’s the proposal:

45 Mitrex 405 Panels, ground mount w/65 ft of trench/wire

45 Enphase IQ8+ Inverters

3 Tesla Powerwall 2

18kw system, no SPAN.

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$135k finalized quote after a solar survey, not taking into account the $40k 30% tax credit. Mitrex doesn’t have the panel price listed, but my guess is $400/panel is about right, inverters maybe $180 per, and Powerwall x3 $25k. $50k of equipment at retail cost not counting the wiring and mounts. After adding mounting, wiring, permitting, etc, my guess is there’s at least $75k left for labor.

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I feel like maybe there’s some wiggle room for discounting, but probably not much is my guess. Thoughts?