Just my opinion but unless it's in an amazing location or has some extra amazing feature, the money, time, and energy it would take to get a construction crew to level the floor is not something I want on my plate especially if the return isn't going to be that significant. 

Intuit just shut down their awesome awesome service of Intuitpaymentnetwork which charges 50cents / payment and had these awesome features like auto request payment.  

There was several podcasts featuring military members and teh challenges of out of state land-lording, and I believe @Brandon Turner did a webinar that featured REI while being Active Duty Military .  

Also, your featured article was a nice read.

-  All the information you want/need is on the site -- you seem to rather ask an open-ended question to try to get people to regurgitate information that is readily available by using the search feature hereMy recommendation is to spend a few weeks/months reading this site, getting familiar with the basics and putting together a plan. 

@Howard Krieger welcome, use the search feature as this question has been answered a number of times.

@Ben Backman, analyze several properties using the tools on this sight, listen to several podcasts featuring multi-family properties, post a forum question to lenders in the financing section.  

I will then begin investing in large multifamily apartment buildings and I plan to dominate. 

You could certainly move the due date up.Cozy does offer a feature for like $2 that speeds up the process.

@Dominic Battezzato...would love too meet up with you.