Minimum this and minimum that is a biproduct of minimum cost. The UK is so friggin expensive that everyone wants to do it everything as cheap as possible.
So I am in the belief that if you struggle in a twin at £250 an hour why bother? Especially if you can get half way there in a complex single for £100 something an hour, not dent your ego/confidence and make your learning curve less steep. And most of all make it more enjoyable and safe.
Don't get me wrong I am all about people pushing themselves and maybe having a little set back in the process. But saftey and enjoyment should come before minimums and cost.