I have had numerous slab leaks at various expenses of which some have crossed 5 digits. 

You will be surprised at how much inspectors and city officials want to be acknowledged and not simply seen as the bad guy....in most cases they are not the bad guy....but that is sometimes the perception.  

Thing is, this property may become a rental down the line in a year or two so before I buy, I wanted to make sure I'm getting a good cash-flowing property as well.I've read a few books and listened to numerous BP podcasts and wanted to get some opinions on this property -- if I do move out, wil this cashflow?

The perceived value you added to their residence may go a long way in offsetting any negative perception from the rent increase, and as you as their new LL.

There are numerous national QI services and that is all they do and our fees typically cluster in a small range. 

I know you said you want to make as much profit as possible, so depending on your investment strategy there are numerous ways to go about what you choose to do.  

I learned from Scott Carson - if your looking to just know more about them and be passive investor then there are numerous books out there including those by Scott, Martin Saenz Dave Van Horn and others.

After listening to numerous BP podcasts we've decided to take action and get involved!

Stay away.There are numerous REIA and Meetups in the Baltimore Washington area that are free or almost free where you can immerse yourself in the industry. 

Worlds most liveable city ;-)There are certainly tons of deals in numerous states within the US where you would easily achieve a $5k per month passive income from rentals.