You have provided only one option and that is use retirement fund.
Advantages / disadvantages can only be assessed along side other options.
Clearly using 'cheap' money is better than expensive money, but opportunity costs must be considered.
Eventually, your purchase objective must be known? Are you going to move right in? Is this a second, third, vacation home? An income earning investment? If you could OWN the home, modify, buy/sell as you see fit and only pay 60% of the list price, how would that influence your decision?
You truly have a world of options, the one best for you is entirely dependent on your situation, goals and objectives.
Best of success,
Annette Lawrence, Broker/Associate
Remax Realtec Group
Palm Harbor, FL
Palm Harbor University High School district http://annettelawrence.mfr.mlxchange.com/?Page=-1