If people just look at the upfront cost, they have that 2x or 3x gut reaction and just switch off.
Some nerdier types might draw up a spreadsheet and know exactly how many months they'd expect to break even and start saving.
People familiar with spreadsheets probably also don't have that much trouble getting loans and paying them back on time, and doing even more sums to see if that makes financial sense.
But your average school bus buyer perhaps needs someone else to do all that for them, hedge the risk and present it to them as an immediate saving on their monthly spend.
People have sold rooftop solar this way, or replaced kerosene lamps in Africa with solar and batteries, and EVs Vs monthly Car payment plus fuel.