Has anyone had experience with this site called: https://securedincomegroup.com/It says you can earn 6.5% over 6M all collateralized through real estate.Anyone have experience at this site: your reviews are welcomed.

If you really DYING to buy this deal, find a hard money lender who will cross collateralize this deal with another one you already own, assuming you have the equity. 

This is more risk upfront but you continue to have more of a collateral over a longer period of time if need be.

you must tell us more. curious to know did the apprasial come out higher than PP or was this cross collateralized, or bank owned property that they wanted off their books?

You may be able to cross collateralize that home for the down that you need, assuming your are getting a hard money loan for the purchase.

They may do it with just a lower LTV 60-70%.If they wont give you the HELOC I dont see why they wouldnt just let you open up a secured line of credit with the duplex being the collateral

I am fine with signing a personal guarantee and putting up roughly $2M worth of collateral.

For commercial, you'll actually have to call local banks and establish a relationship and explain who you are and what you're doing, etc.The final point i'll make about your strategy is about recourse: typically, residential loans are "non-recourse" which means that they are collateralized against the one property, but not  your other personal assets.

@Upen Patel I have a portfolio loan that is collateral on 18 properties. 

As far as you know, there may have been other collateral securing this loan or the bank entered into a deed in lieu or some other kind of discounted payoff, reached a settlement with the guarantors, etc.