1. Base income
rent: 2500/m, tax 7000/y, HOA 185/m, insurance $500, misc repair $1000/year
annual income: $20180 ~ $20K
2. all cash: total investment 430K.
Annual return: 20K / 430K = 4.6%
3. 20% down 4% mortage :
total investment 86K
annual interest ~ $13760, 430K*80%*4%
annual return: ($20180-13760) / 86K = 7.4%
4. 50% down 4% mortgage:
total investment 215K
annual interest ~ $8600
annual return: (20180-8600)/215K = 5.38%