@Martin Z. certainly takes a lot of discipline to take a back seat in but I agree with you that it may be the most judicious move given where our market is headed. 

It takes a great deal of discipline and belief in what you're doing to forgo instant gratification when you have the money to treat yourself, and stick to the plan--living below your means and using that leverage responsibly on real estate.

@Shaun ReillyThe barrier to entry is pretty low for agents and the ethics of wholesalers are, well,what can you say about that.Being licensed as a wholesaler I think gives you credibility, and also something to lose if you're not completely honest with the home seller.How do you discipline a wholesaler for lying to the home seller?

Stay disciplined to your model!

You can pay extra each month if you have discipline.

Cards are not to be used, they are to gain high credit scores. discipline.

You need to build discipline in your personal life to achieve the savings to start.There is good debt and bad debt, get the bad debt paid off before entering into the good debt arena.

If you want to buy and hold, this hard work may come in the form of searching for deals with enough margin to insolate you from market risk of buying in a hot market, and having the discipline and patience to pass on deals that don't have sufficient margin.

In addition, interest only loans are not nearly as common as amortizing loans and I suspect you'd have a hard time finding one with similar term structure as your current 30-year mortgage.Now...IF you can some how manage to make the interest-only loan work, the bigger challenge is maintaining the discipline to invest AND getting consistent, 4.65%+ returns.It's one thing to invest money when it's yours and you don't have to pay it back.  

Some things can work - aggressive, disciplined, low-margin and data-driven wholesaling, for example - things that are more insulated from today's (irrational?)