When my riding mower recently gave up the ghost, I bought an electric zero-turn riding mower. I'm able to cut 1.5 acres (the combined mowing area of mine and my mother's lots) with it but need to recharge when I'm about 2/3rds done. Which it can do while I'm weed trimming and blowing the sidewalk, then immediately hop onto the mower and finish the job.
But I have tons of weed trimming anyway (significant time for the riding mower to recharge to finish the mowing job). It probably wouldn't work as well for most people. I was spending over $330 per year on gas + oil change and air filter slip change (sometimes changing the air filter too). So that might pay off for me having the electric mower. We'll see if it holds up as well as a gas mower maintenance-wise.
What can you pull with the riding electric, and for how long?
With my gas powered rider, I mowed my yard, dethatched, then bagged the thatch all on about 1/2 gallon of gas.
I have also used my gas rider to pull a car carrier trailer with a large swing set loaded onto it, my boat trailer with the boat on it, etc...
I really have doubts about an electric rider in this regard.