Excellent idea. I've been this way doing since 1988 when it seemed the best way seeing as that I had what I needed and even then there were many that didn't and didn't have the resources either.
The one thing I add in this is that when making a donation, innoculate include a note asking that you aren't place on the mailing list. An entire donation can be erased in less than 5 years of mailings and calenders and so called gifts as the organization solicits for more money.
Better yet send a money order instead of a personal check, eliminates the mailings entiirely.