Out-of-state: Notary or Power of Attorney for closing?

[Trace P.]

Hi! I am an out-of-country investor and was trying to find out how I can sign the closing documents for purchase of a property. I heard that the buyer, by right, has to be physically present to sign off. Do I get a notary to do this for me, or a Power of Attorney (is this just a regular Attorney? How do I execute one?), or...??? I've been researching online and believed that a notary would do the job, but upon contacting 3 notaries, all of them told me to speak to an Attorney. If someone could shed some light on how the closing can be signed off remotely it would be greatly appreciated. Thanks!