$3.60 for mogas at a couple places near me. Very high density altitude, well leaned out, in slow flight, you could get 27 minutes out of a 150 for $5

These guys are also apparently getting electricity for 2-4 cents per KWh, which is many times cheaper than most would be able to get it

You'd even have more useful load than this "jet" that can carry no passengers or cargo

You could also fly a glider. It'd be as useful as this thing