Nervous to make the plunge to RF...

I've been building up my EF system for about 12 years now, but the weight and bulk has been really killing my desire to shoot... I've got a dream holiday to Japan this year and am thinking about trading in my 5D mkiii and a load of my lenses for a R6, but damn the cost of RF glass is putting me off! I'm so conflicted, what would you do in my situation?