We use it for managing our portfolio of SFRs and small multi's and it handles everything accounting wise for the properties so there's no need for quickbooks.You can also run your property management business expenses through Buildium or use Quickbooks if that's easier. 

My biggest concern is that some of the houses right across are multi-family duplexes.

We are looking to purchase a multi family property but have no idea where to begin.

With that being said I think you will find the multi-family model, 2-4 units more profitable, than a SF.

New to real estate investing with a focus on the mulit-family (1-4 residential) space.  I am curious what typical seller financing terms/structure might look like.  I am sure the answer is "it depends" hence the term ...

One needs to understand how to check title on their own though.. spending 200 bucks on a title report your going to blow through a lot of 200.00s as I mentioned above not many actually go to sale.

  $100k essentially has gotten me multi properties instead of 1 property.   

While multi-family is a perfectly good place to start, I would tell you that it is often more competitive than single family homes… maybe just due to there being less of them in general, and being more desirable by investors.  

if you qualify, using the VA for a small multi opens up more opportunities as an asset vs investing in SFR.  

I am new to Real Estate Investment, venturing into commercial real estate space (multi-family rental properties) and willing to expand my network to build a team across the different states for potential opportunities.