Could get a personal loan beforehand to help cover the difference.  

Let's say I have 500k down payment and borrow 500k, and the monthly mortgage payment is 5800, and out of that, 4800 is mortgage interest, and I pay 2500 annually for insurance and 10000 for property tax, could anyone ...

There are some very high LTV investor loan programs.

Cash and credit are key when it comes to fix and flip loans.

These are generally business loans based on assets and income of the property often structured as DSCR (Debt Service Coverage Ratio) loans.

They all appreciate but peninsula is more stable in downturns and recovers the fastest, I witnessed this myself in 2012 further in east bay was still about 40% down and peninsula and "tech" cities already recovered fully.I am not sure you need a loan or not, recently I asked my mortgage broker he told me for a second home it would need to be at least 50 miles away and also in a city known for vacation activity .   

So, while it may be legal in most states for you to lend the LLC funds if it is structured as an actual loan, in writing with specific interest and payment schedules, just like a bank loan, it would have no tax advantage.If it's a stock corporation, then yes you can.This would be entered in QB like any other interest loan.Feel free to reach out with any further questions.

The only caveat is you are only allowed one active FHA loan per customer.

Be sure to factor in the effect of Unrelated Business Taxable Income (UBTI) if you borrow money (non-recourse loans only) to purchase the property by the self-directed IRA. 

Can I take out a hard money loan for the 43K plus the 40K rehab amount and have him owner finance the rest of the purchase price to me?