At that point, the mortgage will be cut down significantly and refinancing to decrease the monthly payment and increase monthly cashflow will allow me more freedom to expand and purchase another property(and so on, hopefully). 

As a result, prices have only decreased by 4.7%.

Decreasing crime indexLike I said there are a bunch of other criteria you can and should look at depending on your strategy.

Now reduce your percentage of 30% for total available credit balance, which starts to decrease at 10%, not 30%, and subtract a portion of that, usually 3-5% at 11%, and increasing in loss of points per points above 11, seeing substantial drops at anything above 30%, and additional negative impact at 50%.Now assuming you are at a loss of 10% for the average, you drop 85 points, because lets face it, not many people have 10 accounts for 10 years on average, the average person has 3-5.Now assuming you lose another 3-5% at the lowest, with a more realistic loss of 10% for 30% of credit max, you actually reach roughly another 25-30 points, for a grand total of over 115-125 points.Now assuming the average americans credit score is a 720ish ball park, you just dropped from a good credit score, down to high 500s, to low 600s.

Are you planning to keeping buying this year despite some rumblings about decreasing prices?  

Some areas are decreased in value since last year, depends on location.AC does have value, again depends on location and how hot it is in summer. 

My aim is to build up a massive property portfolio, but my dilemma is the fact that I don't have capital - and after I finish studying, it will take a while before I will be earning decently.I am in the process of purchasing my first property and I know how important it is to hold for as long as possible (especially if you are wanting to build a property portfolio), but after I purchase the 1st property, it will take at least a few years 6/7+ before I would be able to put down a deposit on another property.So in this sense, do I flip my first property and repeat this strategy until I have enough capital to purchase a property, hence decreasing the loan amount I need (allowing me to easily purchase another property as one will fully pay off the other).Or do I buy one property and hold it for say 6 years until I have enough to put down a deposit on a second investment?

Also keep in mind that the gov't is pushing for high inflation so your future purchasing power will be decreased in real terms using dollars.

I just ran across a price decrease on a self-storage business here in Texas.

I can say that if the per capita household income (adjusted for actual inflation) is decreasing in a location, over time property values and rents will tend to decrease.