Originally Posted by
pug123
this person that invites me to live with him could also confirm his invitation in writing with all his information adress name workplace etc,
Be careful with providing such documents. Especially if your friend is of the opposite gender a "He will be living with me" could easily be construed as a "We are a couple. We want to live together", which is usually a big "no no".
Have invitation ready and give it to them if they start asking questions, which is IMO unlikely. Have the contact information (address + phone number) of your host ready if they want to verify. Ask your host to be available in case they contact him by phone.
Originally Posted by
pug123
This was the information i've found about money: "Travelers visiting the U.S. from a foreign country must be able to prove to a CBP Officer that they have sufficient funds"
It is unlikely, that you are asked to prove that you have sufficient funds. None of my relatives were asked to provide such proof. 600$/2 weeks is obviously not that much, but IMO should be sufficient. If you have a credit card (I presume you have a credit line of another X00$), you should have sufficient funds.
The general rule about immigration is: Be calm, be honest, don't ffs lie, reply correctly, straightforward but with as little words (e.g. Answer a "yes/non question" with "yes" or "no" and not "Yes. I'm here to visit the Gran Canyon, visit my friend, etc...").
The officer won't give you a hard time, unless you give him reason to do so. And
don't lie.