Yes, borrowing on margin is a really good strategy, although it depends on your broker how that functions. I've had a good experience using this for smaller amounts, but given market volatility I'm concerned about borrowing this large of a sum on margin, as I don't know what clown stuff is going to happen in the next 6 months, a credit card feels lower risk to me, although the interest rate is higher. I actually considered this, using a credit card will cost me $530 in additional interest over taking margin, but has lower risks in my estimation. That $530 is not enough for me to feel it's worth it to do it via a margin loan.

That said, margin is really useful as a tool because it lets you unlock the value of your investments without tax penalties in lower volatility markets.