Don't let his graphs scare you. Make the decision based on what you know about your finances and the local market.
Buying housing can still be a good investment, or it can cause you to lose any hope of being financially secure. It depends on the market, how you buy, and what you plan to do with it.
E.g. It's probably a very, very bad idea to buy a small home in [link|http://realtor.com/FindHome/HomeListings.asp?locallnk=yes&frm=byzip&mnbed=0&mnbath=0&mnprice=0&mxprice=99999999&js=off&pgnum=1&lnksrc=&fid=so&stype=&mnsqft=&mls=xmls&areaid=45405&poe=realtor&zp=45405&sbint=&vtsort=&sorttype=&typ=1&x=51&y=13|45405] with the idea of selling it for a quick profit. (There's dozens of houses for sale there for less than $25k.)
How comfortable are you in living with people who keep long hours, may like loud music, may have housekeeping issues, may be tardy paying rent, etc.? I'd personally be worried about issues like that in the situation you describe.
Keep in mind that many people don't like to buy houses that they knew were rentals because they have a reputation for being used hard and not lovingly cared for. There also may be tax issues (a rental is a business so you can deduct costs of repairs, but that may trigger things when you sell) that you may need to consider.
Another thing to consider is the commissions and fees that you'll (or the seller, but it's in the price) have to pay to buy a place. You'd need good appreciation to make that back and not be in the hole after only 2-3 years.
If the numbers look good to you, and you're able to tolerate the social challenges, and the market looks good for rentals, then don't let the story change your plans. Just go in there with your eyes open.
My $0.02. Good luck!
Cheers,
Scott.