Welcome aboard... information here is plentiful. Theres always variables that play into info. No 2 homes are the same, each user/operator of heat source have different lifestyles, etc, etc. Think carefully about what you can do now vs. what 5, 10 years from now will be for yourselfs. One thing for sure, you will learn to enjoy the lower cost(present days) of heating with coal. Other things to consider.. type of heat, radiant, hot air(ducted), water baseboard. there will be additional things to consider for each type. Such as backup power for running controls, etc.
Good luck shopping and enjoy the friendly folks here.