Papi Jo said:
I'm afraid clumps of 3 birch trees is very out-dated. They seem to be a standard feature of small front gardens of houses dating back to the 1970s around where I live. What makes things worse is when, in the course of years, such birches have grown too tall for the space allocated to them and they are horribly mutilated. Hope the OP can consider alternative species. Of course "each to their own".
Speaking of small front gardens of the 1970s, our next door neighbours have a clump of pampas grass in theirs......Apologies, off topic