Our lawyer has said a LLC will be overkill for this situation and will have additional overhead.

If not, there are multiple CPAs that commented on this post that you can reach out to or I can provide a recommendation if you'd like.

Multiple, billion dollar companies are investing heavy in our area, such as Intel, Google, and Amazon.

But it really depends on your specific situation, and your goals for investing in real estate.  

What are your thoughts on buying with cash to be competitive with the offer in a multiple offer scenario and then finance the property immediately after closing to get the cash back?

Or house hack with 10-15% down + closing costs but same % of reserves.Until then, keep saving in a HYSA or as "risk-free" as on option with some yield will provide.You're not situated to be an REI right now, just deal with it.

Context: My spouse is a real estate professional by materially participating in the management of multiple Single family Residential.She spends more than 750hr and keep a methodical record oh the activities.

I would hire a CPA to do your taxes as they'll make sure you are filing properly and in a way that's most advantageous for your situation.  

You're likely to get multiple families or groups of friends in the larger homes. 

But, that is not always the right answer and you should speak with someone familiar with your personal situation to get advice specific to you.