Buying dupex to house hack, should lot sqft matter that much?

[Bryan Barth]

I've been looking to buy my first property, after 1.5 years of studying, and a lot of analysis paralysis I'm ready to pull the trigger. I've been looking for a duplex to house hack. Which will get me into the real estate game, and help start my buy-and-hold portfolio. I have had good luck finding, and identifying several properties that I am interested in. My question is if the property is completely ready to move tenants in as well as myself, Price is good,  how much should lot sqft really matter, when it comes to buy-and-hold, cash flowing properties?