I recall seeing free home water testing kits in home depot a while back. Not sure what those kits tested for but they were a means to sell you home filtration systems and plumbing stuff. But they were free. Maybe start there?

Outright purchase, finance, or lease are the 3 options for getting solar. Many people prioritize this on their wish list, save up, and eventually can afford to do so. There may also be subsidies, rebates, and tax credits (federal and/or state) that may apply. New York, for example, is eligible for a max federal credit of -$5700 and a state credit of 25% of your system value to your income taxes. So that would shave off a lot.

Piggybacking to also recommend realistically assessing if you might move prior to that breakeven point. I don’t know if solar panels have good ROI for house selling or not.