You can get whatever kind of financing best suits your financial situation, i.e. cash on hand, debt-to-income ratio, credit score, etc. Call a mortgage broker with investment experience, e.g. Brian Morrison 214-893-8953, to get actionable advice on this.
I think what you really need is landlording advice. I've owned a few duplexes for several years. Let me know if you would like to discuss.
comanche3000@live.com
979-450-1994