As an update to sending Christmas cards. I completely forgot to mention that I use Jacquie Lawson e-cards through the year for all kinds of greetings cards. It currently costs £7.25 for 12 months, and you can send as many cards as you like in that time. So you could send birthday cards, new year, easter and christmas cards. A few get well cards and just thinking of you cards. They are beautifully animated and are all accompanied by music
Jacquie also does really really nice advent calendars. For £2.50 you get the base advent calendar and 24 different animations, games or activities. This years has had snowflake designing, jigsaw puzzles and make up a flower arrangement games so far. The snowflakes and flower arrangements are saved to your computer hard drive as jpg files, so can be printed off and used on any hard copy cards you want to send. Fun for me, let alone the kids! There is an Edwardian version and an Alpine one available this year.
Using an e-card provider means that you can send greetings to a lot of people, hundreds if you like, for the entire year, without having to fork out for cards and those very expensive stamps, and having just one, fixed, overhead
I have sent a card to myself, and attach the link here, so you can see what they are like, it might work!