Sound like a good idea or would you guys recommend doing a home equity loan and leaving the rate and payments

I have no fears in getting a bank approval, and it down payment is not an issue either.

In these real estate deals you are dealing with 10s of thousands of dollars and when things go wrong on a thin budget is when you see dumpster fires and hear the cautionary tales.Most new investors concentrate solely on the down payment when in reality there's lots of costs: Closing costs, Holding Costs, Utilities Cost, you'll have to lay out money to the contractor for them to start the project, and there's taxes and insurance there's transfer tax title costs.More capital than you think is needed. 

We closed on the sale of the property Thursday at a sale price of $1.7 million with $412,000 down and a 2 year balloon note (with options to extend) for $1,288,000 at 9.999% interest with interest only monthly payments.  

Does anyone have any suggestions or pointers for a Credit score, lenders/broker, location, down payment amount (15%?)? 

If the buyer defaults, the seller finds himself personally liable for payments, or if the default goes far enough, liable payment of the loan balance, on a property he does not own.  

When trying to add it back the link does not link to the payment portal.

I have a large income, great credit score, a down payment, just not enough for 20% down OR not enough down to meet the conforming limit of $766,000.  

How would I actually go about accessing the HELOC funds for the down payment?

The group collectively contributes the down payment, closing costs, reserves, and reno $$ if applicable.