Since you don't know the initial steps, you won't likely know what a good deal looks like, how to maximize your monetization of that deal, how to properly draft a contract with favorable language, how to exit the proper and a dozen other things an investor must know how to do in order to successfully acquire and sell a property. 

Cash is the most liquid.Put that money into acquiring more income-producing property.My $0.02 ...

In the event of the UK leaving the EU, possible scenarios include:The UK remains in the single market therefore Britons maintain their rights to live and work in the EU, similar to citizens from Switzerland, Iceland, Norway and Liechtenstein.The UK stays outside the single market but the UK negotiates terms with individual EU countries, such as Spain, resulting in legislation giving Britons similar rights to those they currently have as EU citizens.The UK stays outside the single market meaning Britons acquire similar rights to non-European nationals buying or moving there, such as Australians or Americans.So, in the event of Brexit, we’d essentially be treated like any other non-EU, non-European Economic Area (EEA) citizens, Americans and Australians, for example.

I've dedicated a lot of time over the last year researching and learning about REI, but I have not yet acquired my first property.  

I've set a 10 year goal for myself to acquire 50 rental units.

As long as you aren't acquiring in a war zone you should be ok.

And it sounds like there's a bit of a bias from experience against acquiring a list of property owners of multi-family properties.  

:-) Or at least how difficult/rare those opportunities are and what it took to acquire it?! 

I’m interested in acquiring a mobile home park in Michigan.

Some companies look at their cost to acquire a customer through traditional channels and determine that paying a sales staff of entrepreneurs is a much more cost effective way to gather customers.