Wow, that's a lot. Are you doing any exercising or gyming? I would imagine that I could exercise, but probably on a non fasting day.
No gym or exercise other than my 8500 step a day dayjob and 2 young kids. When I lost 26kg's on LCHF I did include cardio 4 to 5 times. This time I don't really have time for gym, hence IF will offset tge reduced daily calorie expenditure. I should lose at the same rate or slightly more compared to LCHF plus cardio.