We should be investing solar in lower income communities, as those people could really use cheaper utilities, and any saving they get would immediately go back into their communities.
Good news, these are called "community solar gardens" and they exist all around the USA, here's a large one based in Minneapolis: https://www.cooperativeenergyfutures.com/
$16M for 700 homes = $22,857.14/home
That's not an investment, it's just charity by other means.
The other part is these solar gardens don't stop paying for your electric bill if you move, so it's especially equitable for renters.
Two of these would do more than that (10.5 kW), for (at current exchange rates) $5934, or just over a quarter that price:
https://www.kaufland.de/product/512021383/?search_value=sola...
And even at that price, it's overlapping in price range with the non-solar equivalents.
The funny thing is, I grew up (in the UK) with news stories about how the latest computers were so expensive in the UK that it was cheaper to fly to NYC, buy one, and fly back with it, than to buy local — and now the US is having the same problem in reverse with PV (you might well be able to fit some of the much smaller flexible PV systems I've seen around here in Berlin into oversized luggage).
(Sure, I get that big projects aren't exactly the same as small ones… but usually that makes big things cheaper, not more expensive, even for home PV vs. park PV).