Hi Brandon. This is one of the most debated topics I have seen asked on multiple forums. So what you posted as your reasoning behind the LLC is great, and does work out for investors. I myself have set up LLCs like this as well, but it always boils down to personal preference as well.
So I have set up a "Parent" LLC which is for my real estate investing business; to do transactions for flipping, wholesale deals and for my commissions as a Real Estate sales agent. With the "Parent" LLC, I can then have "child" LLCs that will have the same operating agreement (husband and wife) as my "Parent" so that I can keep my buy and hold in the "child" LLCs. Also when I do future deals with other investors my "Parent" LLC name will be used as member of that future joint venture.
Now having it set up like this does cost money to set up and of course yearly fees. So be prepared for this as well.
So if you are starting out you can go with one until you start making some money to create more. IMO I thing as long as you treat it as a business you will be fine.