I've never raked grass unless I want it for mulch somewhere. Use all mulching mowers. Latest is a Ryobi ZT480e, 48v lead acid batteries. Will mow up to 2 acres on a charge. If you got an Ego with extra batteries, you could do 3 1/2 acres. However, gotta ask why you're mowing that much. Mow trails and then brush hog maybe once/yr.
Before the Ryobi ZT, we bought a Ryobi 40v "cross cut" 21 inch mower. Wive mowed our grass with it. With the ZT, I can do it (have neuropathy and a reattached left quad that has never stretched out).
Before going electric, we had an old JD self propelled mulcher and a Honda self propelled mulcher.