Bugatti ownership in the UAE – battery maintainer or regular replacement?

I'm fortunate enough to have a Veyron that mostly sits in my collection, maybe driven once every few weeks when the weather is nice. The previous owner warned me that these cars are absolute nightmares with battery drain because of all the systems constantly monitoring things, and he said he went through two batteries in three years before he started keeping it on a Ctek tender full time. Problem is, my garage setup isn't near a plug, so I'm looking at either running a very long extension cord or just accepting that I'll need a new battery every year or so. Someone at a cars and coffee event mentioned the Reliable Bugatti Battery Installation Service with Battery Zone UAE and said they come to your location with the correct spec batteries that handle the heat better. Has anyone here actually used a mobile service for a hypercar? I'm always nervous about letting just anyone touch the car, but dragging it to the dealer for a simple battery feels like overkill too. What's the real world expectation for battery life on these when you can't keep it on a tender?