Hi @Nick Brown,
I'll take a stab at this by breaking down the questions. Of course, I'm not providing legal advice, just information.
First, there's a lot of info on the forums about whether you need the LLC for protection with early purchases. More important right now is insurance. A private loan is an option if your family is willing to lend to an LLC.
If you're doing this seriously, don't just file on LegalZoom; have an attorney with real estate LLC experience do it. Filing with the state is easy, but that's not what you pay for. You're paying for the detailed operating agreement, the correct structuring, and other things that actually provide you protection.
Talk to your attorney before just accepting checks for financing. You're treading into securities laws, which can be complex and highly punitive if done wrong.
Finally, you could get financing, but they'll want collateral. You're new so odds are they'll require a personal guarantee for financing, so $500k may be tough without some family co-signing that loan.
I'd love to hear others' takes on this as well.
--Sean