Margin

Please enlighten me.

I want to DCA average $100 into btc every week at 3x margin. I would do this on Kraken. My plan is to do it for the next 24 months, I will not sell any btc during this time. Every trade will be with 3x margin. I’m told the fees could eat me alive.

Good idea or bad idea? To much margin or not enough? Thank you