Conrad purchases a condominium in Aspen, Colorado. Because of his hectic work schedule, Conrad is unsure how much he will be able to use the condo over the next few years. A friend of his who has a condo in Aspen tells him that the condominium is both a great investment and an excellent tax shelter. Conrad's friend has been able to rent his condominium for $1,000 per week. Conrad expects to incur the following expenses related to the condominium:

Conrad is somewhat hesitant to rent his new condo out for the entire year, just in case he can sneak away from work for a few days. Therefore, he wants to explore all his options. Explain the different tax treatments of his condominium expenses depending on the number of days he uses it.