@Brian Sealey NPV like IRR ard DCF are great for convincing an investment committee, outside investors or sophisticated jv partners to come on board a deal because they're comparing what you're offering to what other shops have. But, if it's just you in the deal and/or the property is a fourplex that kind of analysis is total overkill.
When you go to a bank for financing they're not running those kinds of numbers because what's really important is that they're comfortable the property will throw off enough cash flow to cover debt service with a margin of safety and be worth enough that they can recover their principal if you default.
Those two things should be an investors main concerns as well; does the property comfortably throw off enough cash to make it worth my while and will it be worth more in the future than it is today? If the deal is an income property, i.e. 5+ unit apartment building, self storage facility, mobile home park, office building, retail center, etc then the value can be calculated from the Net Operating Income capitalized at some given rate. If the property is a house, duplex, triplex, fourplex (some say anything under 10 units is a plex) it's value will be determined by comps and therefore isn't an income property that running numbers on will produce anything meaningful.
And speaking of meaningful numbers one of the biggest problems with NPV, IRR and DCF is that the results are very influenced by things that happen in the future, which is very difficult to predict. So much of their returns are generated by what amounts to educated guesses and so much of a property's return is generated by how it is operated that the two can be pretty incomparable.
Good hunting-