Apartment buildings are great and they also have so many moving components that factor in the returns. Sometimes its all capped out and overvalued and sometimes there are huge opportunities for growth that are not being utilized such as adding a laundry facility, vending machines, garage parking, storage etc etc etc.
An apartment building like you are describing may have many later ownership advantages on the back end v/s the cash flow from the start on the front end. It really depends on the property value increase percentages in that properties market year to year, the % rent increase values per year in that area, and your investment strategy as well.
If the property is in a high growth area, stays occupied, and is now low maintenance after rehabbed then it might be a great investment. I have recently researched these types of loans because I have been looking to buy more multi units as well and I have not purchased in a while. They do offer 30 year loans and some 35 year loans for this type of property. The loans are really different compared to residential.
If your tenants pay the mortgage for 5-10 years and you break even each year then sold it you would still gain on your equity but it depends on how you invest and the opportunities in your area. Some people would just buy this for a tax write off and differed gains, not me..lol. If this would be a long term hold and there is room for rental income growth each year then you would gain cash flow each year while the asset pays for itself thus building in cash flow and value.
Some people will refi a place like this every couple years to buy more properties once the equity is there or they will refi the remaining 25 year debt amount for another 30 therefore creating cash flow after 5yrs. To some, not all, this is their investment model and they have the money to do it. They are just looking for a place to park their $$ for tax purposes and future return on investment.
Be sure you see actual #'s on this b/c as Paul stated above there is always maintenance costs that are "properly in line" for the age of the asset, even if rehabbed.
Myself I need cash flow right up front or its not worth my time but it varies for every market and investor. Some people are more risky than me but I like a safe investment.
Check out Ken McElroy here on BP, he has a lot of material and knows his stuff!!!! You might figure out more from him on this answer than anyone on BP can offer.
Here are some links that might be of help also.
http://www.biggerpockets.com/renewsblog/2013/06/21...
http://www.retirerichfromrealestate.com/How%20to%2...