The downside is They get a variety of unknown people who don’t know the Hoa rules or the local customs/moirés of the neighborhood.  

The downside is the extra fee (origination and processing fee, ~1%).If you want to go to bank directly, local credit unions have great rate.

However the downside is that you don’t have full control over what happens with your property.

The downside is they simply do payments and nothing else, you'll have to go to other methods for tools. 

You capture all upside in your simple calc an no downside.

All deals have downsides, the more clearly you can articulate these and show you’ve planned for when things go wrong the more trust will be built.Draft a one-page overview of your experience and accomplishments as a real estate investor.

The only downside is that if a common area is damaged and nobody fesses up to it, I just have to repair it and move on.But it would be the same as in a multi unit building. 

But does come with the downside of managing the build process.

A big downside of using retirement accounts. 

I'm new to this forum so not sure if one can message me but if anyone is interested in exploring this, please feel free to hit me up.After reading so many threads on risks associated with arbitrage as a landlord, I may need extra assurance of downside protection if anything goes wrong in the future.