I started the season mowing around 30K with my GM1600. I was about to die cutting every other day at almost 2hrs when I was pushing the Bermuda to try to fill in some spots before starting PGR. We had a hiking trip planned this summer with my older teenage boys in the Rockies, so the exercise was worth it for preparing for that trip. Once under regulation, the cuts went to every 5 days when I got the PGR dialed in. When the heat really hit, then I pulled back on some of the backyard area and made a fairway type shaped cut around the porch area in the back. My front yard is 9K and then I am cutting another 6K in the back now. Cut time is around an hour. You can always play with what all you cut with the reel and then rotary some stuff as well. If you can find a triplex, then you can do some really quick cuts and wouldn't have to regulate as much or possibly at all. If you go with a walk behind then I would say you want to plan on using PGR to slow things down. The unicorn pee (pgr) has been amazing besides just the slow down in vertical growth. I have around 15K of pasture common Bermuda
on the very back of my property that has turned into a completely different grass with the PGR. Nothing like a hybrid but a tolerable grass vs common that is not under regulation. I am going to be looking for a triplex when I can so I can cut my entire acre with it. It's a rabbit hole for sure, but the grass looks amazing cut low.