I’m almost 76, but feel as healthy as I ever did. I can’t, yet at least, give up doing my own. Sometimes, I wish I would. I only maintain my Ridgeline, Venza, CanAm Defender Cab, Honda 300 4Trax, Ferris ZTR and Kubota GR2120 Lawnmowers, Cyclone Rake, Kubota 4701 plus attachments, Honda pushmower, , 3 chainsaws, brushcutters, weed eaters, and most house repairs/maintenance.
Going to an Ego Chainsaw and pushmower (while still owning my gas powered versions) has really reduced servicing. I think that though the overall expense will be higher (battery life/replacement) , the advantages of electrical power for an incurable self servicing person might outweigh the extra cost.
The exception, IMO, is a Toyota hybrid. It requires so little maintenance, which is very easy to do. I like my Venza!