By Rick Kuper, Broker Home of the Day is presented by the Austin Business Journal with Kuper Sotheby's International Realty. This is your invitation to view some of Austin's most-luxurious properties. Come inside and take a look around. Click on the gallery image to view today's featured property. Ivy Lane Estate, San Antonio, TX 78209 | $8,500,000 Enveloped discreetly behind ivy-covered walls in this highly desirable neighborhood, this stately home is a world unto its own with irresistible charm…