There are solar forums that you can look over and see some 'real world' opinions/reports about how folks have faired with 'going solar'. From what I have read the general consensus is the best deal is a smaller net metering system that will offset your use a bit and sometimes push into the grid.
https://www.solarpaneltalk.com/forum

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1985 300D
The rest:
1957 MGA (comatose)
1965 Falcon (sleeping)
1966 E-100 (rust test in progress)
1976 Ford 3400 D Tractor (workhorse)
1978 Mercury Zephyer (5L playtoy)
1995 Isuzu NPR D (fetcher)
1998 Subaru Legacy (Spare)
2000 Toyota Sienna (School bus)
2008 Toyota Prius (Commuter)