What website or data do you use to figure the above out5.

The property info is correct, however the loan data is estimated so if my estimates look off please let me know.

With the housing shortage, those bigger properties are worth more and going up in value faster than the duplexes. 

This is essentially using OPM (Other People's Money) to build wealth over time.Appreciation: Appreciation Over time, real estate properties tend to appreciate, or go up in value, at about the same rate as inflation (3-4%).

Based on the limited information you posted, and assuming the property has gained in value, I would sell and find something with a better return. $183/month on a property that rents for over $2k isn't enough cash flow in my world. 

In value-add deals, typically you are looking at ability to move yield (going in cap rate vs stabilized yield, and making sure that delta is large enough), IRR, equity multiple on deal, and maybe average cash on cash over hold period.  

I have heard that these homes don't last as long as traditional homes and depreciate in value pretty quickly.Look forward to hearing for you all :)Jamie

Market conditions are differentPurchase and Sale agreements are written differently Lenders have different underwriting criteria, etcIf you have cash saved, next step is to build your team in the market you want to be in:RealtorMortgage LenderInsurance BrokerContractor/subs if you are not doing your own rehabAs long as they are good, those people will be invaluable to you and ultimately make you money.

Those sites may give you a window into what to expect, but I would back up that data with what the market is currently looking like.

Excel and free software are great if you don't plan to grow very quickly or if you don't mind all of the manual data entry.