My first wedding cake was four tiers but I’m sure five tiers wouldn’t be that much more of a challenge, although I suppose it depends on the sizes of the tiers? Mine was a 12", 10", 8" and 6". If you were to plop a 4" on top of that then there wouldn’t be a problem, but putting 14" cake on the bottom would double the weight of the entire thing so you’d have to consider wether that would effect your ability to deliver?
The correct amount of dowels is essential. If you wanted extra support you could go for one of the ‘cake frame’ systems for peace of mind? Also good thick cake drums on each cake instead of thin cake cards are essential for supporting the weight of the cake. If you still don’t think you can get the fully stacked cake there in one piece then assemble at the venue.
I’d definitely say yes if I was you Karen. You’re certainly more than fit for the job. 😃 xx