In Ireland there is a 750kg weight limit for anything towed behind a vehicle with a dry weight below 3.5 tonnes. I'm sure the same/similar rule applies in the UK.
I have a trailer for powerwashing,.. its as small as it could possibly be built, and I still think its a disaster when it comes to residential work for parking, turning etc.
I'd say vanmount 100%,.. trailers are nearly always more hassle than they are worth.