An aeroplane I new very well.
My advice however is dont do it.
There are better alternatives out there and top of the list is the YAK 52 which is in a different class altogether and almost certainly cheaper overall. Then there is the Pitts which is definitely cheaper.
The ex RAF Bulldogs are tired and heavy with fatigue. Parts fail far too often and are becoming more expensive to replace by the day. Its also generally far more work to replace a part ( therefore more cost ) as everything else has to come off first.