Hard money lines of credit dangerous?

[Sabrina Maples]

I've been calling small banks here in Arizona and a few of then say that they need collateral for the line of credit. Specifically my home. Is this normal? Also my lender who I usually use, advised against doing this because he said many new investors get over there head and can't get out. My husband and I wanted to do the BRRRR method but he was suggesting instead of using hard money or a line of credit to just purchase it traditionally will equity from our home (which would not be enough for rehab and a down payment).

Any advice would be greatly appreciated. This is going to be my first deal and I want to make sure all my ducks are in a row. 

I have a 1 year old son and we are one 1 income and looking to having a portfolio big enough to be financially free.