No, by all means. I'm not picking on you. Most people don't even know how an I/O loan amortizes, never mind an option arm. Suffice it to say, payments spike higher than they realize. Matt is right about home ownership, it does help a community, but when people are stretching to own, and the barrier (read down payments) is taken down people will spend what they've "qualified" for. Sorry for taking this thread off topic.
As for the transaction costs you not only have realtor fees, but home inspection, closing costs on the loan, appraisals, attorney fees. Just because some of these are wrapped in the purchase price, doesn't mean you don't pay them. I only responded because I would hate a young man who is currently renting comfortably,to tie up his finances for 10-15 years without hearing both sides of the equation.