However, I don’t have a US-based W2 (but work full time for an American tech company in their London office). 

I’m based out of Lehi, Utah, and have always been fascinated by the potential of real estate to create opportunities and build wealth.After spending time learning about the industry and what it takes to succeed, I’m ready to dive in and start making deals happen!

This is the foundation of why LaPlante Real Estate is based in portfolio management and property management... my personal portfolio started in 2009 and I find the majority tends to be Section 8. 

Fortunately our remedy was fairly simple, large floor fans and new ceiling tiles but it was a massive inconvenience and the damage would likely be much worse if it repeated in units in other places.

The single biggest issue in my way currently is obtaining enough cash, whether it be my own, or through partnerships or family/friend-based lending (which I am very hesitant about to begin with as this could potentially strain relationships unnecessarily when money is involved).

Your first challenge is - you shouldn't buy based upon zip code!

Is it better to diversify your portfolio in one geography, tenant base, style of property (SFH, Multifamily, Apartment).

Based on the info you provided, it seems like a no brainer to make it a rental.

Typically its done for open space or use for community property (ie. fire station location or other county use) and typicaly would assist in increasing tax base.  

(They could have a base amount of 1,000kwh for $120/mo.