In terms of finding new leads to generate for potential buyers my first suggestion would be to check out the influence social media has AKA Facebook or Craigslist.

Are there any other legal implications I should be aware of? 

I saw what was happening (socialism) in King County, especially Seattle.

Start a direct mail campaign.Post on your social media every day (not necessarily about REI every day, you don't want to bore your followers)Talk to everyone you know, and tell them you are looking to start your real estate investment journey.In my experience once I took action, I intuitively knew what to do next.

Would there be legal/tax/Financial implications in closing with the first, already established LLC (of which I am the sole owner), and, as soon as we obtain the Tax ID nr for the second LLC (sept/Oct), transfer this apartment from the existing LLC to the new one (owned by 4 brothers)? 

This front-end filter may be financial (a consultation fee), schedule-restrictive (limited availability, so no fee but scarce time), social exchange restrictive (still "free", but we're exchanging commensurate value, like your digital data or something else), or some other filter.The light I hope to shine here, Nat, is that this fee is likely a way that this practitioner is creating a front-end filter as a way of addressing the bottleneck in their business. 

You’re trying to not trigger some guidelines having to do with social security or Medicaid, I would think.

I got too many references, among dock 365 SharePoint customer support app fits our budget, even though it doesn't seem ideal for a real estate business, but has basic features that every business wants.Though I got referred to this by my social media network and most of them don't even know about the work we do in the real estate field, so it isn't a good idea to just follow it blindly.Thinking of getting expert advice, I retained about the veterans of this board, so does it look like a wise decision to choose a SharePoint customer care app for a real estate business?

I know that Foremost has better rates, but any company that requires my social security number to get a quote isn't getting my business.

If you are on social media you can also look for local Facebook groups which is a great place to find local investors and ask questions pertinent to your market.