South Beach Studio Investment Analysis on a Cash Purchase. For a friend looking to pay cash on an inexpensive South Beach investment property… South Beach Studio Investment Analysis 642 MICHIGAN AVE # 17 Rental Income Estimate $800 x 12 = $9,600 Vacancy Estimate 30 days (-800) Taxes (Est.) $1,715 Maintenance $238 x 12 = $2,856 Prof. […]