Order your flowers from a local florist, not through the undertaker it will be cheaper.
In our familiy we just place a bouquet of flowers on the coffin, so that someone can take them home afterwards and put them in a vase. The last thing that anyone at a funeral is doing is costing the flowers and judging whether you are cheap skate or not, especially when you are otherwise asking for donations to charity in place of flowers.
Your father should do what he feels like doing and do not even think about what other people may think because it doesn't matter. A funeral is all about the recently bereaved.
Is it me or am I getting mixed messages
How do you acknowledge Easter.