Ben Kumar: The myth of 'cost-free' model portfolios

Doing model portfolios ‘DIY' might seem like a good cost-saving measure. But have you considered the hidden costs within? Sometimes, there are things to do around the house. Whether it's hanging a picture, fixing the boiler or resealing the bath, I have an overwhelming temptation to give it a go. After all, I've got a toolbox, a brain and the internet. Why pay a third party? The answer - every time, in my case - is because I'm not thinking about the long-term. The picture might end up on the wall, but I've now got to fill in and paint the holes I've made. The bath is watertight, but I...