I work and live in Boerne, and that is a loaded question! Length on market depends on Price, location, land and what shape the home is in. I have had homes on the market for 10 days , and some for over 7 months.
There is a lot of homes on the market which makes home stay on longer because the buyer is not in a hurry anymore because there is so much to look at and it is hard for them to make that decision on which to buy because more keep coming. If you want it to sell fast, make sure the home is ready for the market , fix , update and clean, and price it right at Market Value or below. If you have time, then price according to your Realtors advice and make sure you home is market ready, can be shown at all times and the photos on line are the best they can be.
Average is 6-8 months for priced well, ready to sell homes. Some longer, some shorter. but that would be a good average.
Anyother questions, I will be happy to answer.