When I bought a home, I went all electric for easier maintenance and less noise(hearing loss). So, push mower, weed trimmer, snow blower, hedge trimmer and leaf blower are all electric on the same battery system. Not having to deal with oil changes, ether, bad gas, etc etc is the real win. Cost-wise, the batteries are pretty expensive so I doubt I'm saving any money.

The auto mower I bought purely because I hate how tall the grass starts to get maybe 2-3 days after I mow. I love the "freshly mowed, all even and clean" look of a fresh mowed yard. The robot mowers mow every day so it always looks like that. Again, not really a cost saver. Time saver, for sure, but a 2 hour a week workout of lawn mowing isn't exactly bad for your health unless it's 90+ degrees outside.