It’s actually his wife who built and runs it. I live close by and have been to a few of their fundraisers and events. It’s almost certainly a tax haven, but they actually do good work for human rights keeping slave labor out of construction projects. During Covid, they were the first team to acquire and distribute free PPE to the area. So yeah, it’s a somewhat odd institution, but I’d wager it’s no sketchier than your average church.