Hello everyone, I'm looking for some advise as to whether this is a good deal or not. Please bare with me as I'm not good with all the #s. My dad and uncle went 50/50 on a 4-plex which costed $650k. The mortgage is $2030, property tax + water is $1000, paying $1000 back to equity line and rental income is $4650. Net per month is 4600-2030-1000-1000=570. With that, I am now in a position to buy out by uncle's share. However, they are requesting an additional 50k on top of their 75k down payment. We've had the complex for about 2.5 years. If I pay him 50k (on top of returning his 75k down) for his 2.5 years investment, I calculate a ROI of 17%! Someone please correct me if that's wrong. Assuming I buy him out this very minute and do finish paying off the equity line with my dad by mid-2016, the 50k I owe him divided by the rental income will me 8.33 years?! Is that good?