To add on to what @Rick Momsen has said.

I also plan to choose the coverage I feel is enough and look into the optional add-on’s depending on the area.  

Why would you decide to lose the income from the other unit and add on construction cost to add space?

I didn't need to add one because we're with in .5 miles of public transportation. 

I would post an add on BP on what your looking for as there are a lot of note investors who sell one-off notes to investors that typically have higher returns than FCI notes especially on the performing side.

Obviously, I'm not an attorney and I haven't verified this with one, but I've heard in my state you can charge a storage fee (equal to a month's rent) for holding their property, charge them whatever amount your lease says for releasing fee, and then add on whatever damages the deposit won't cover.

Add on management fee, maintenance, cap ex., vacancy and utilities not paid for by your tenant.  

to add on to what @Scott Smith said.

Hi BP Family, I am looking for multi-units to add on to my portfolio.

To add on to the last post, also make sure the seller brings (or credits) you with the security deposit(s) and any pro-rated rent for the current month that you close.Regarding lead, I'm not sure about your state, but in MD, rentals must have lead certificates.