Anyone have any idea on how to move abroad at 19?Watch
You can't just "move to the USA" (unless, of course, you're a US citizen). If you want to work there you'll need to find an employer to sponsor you, and they might need to be able to prove that they can't find someone already entitled to be in the US to work for them in that role.
Whatever you do, don't travel to the US, claim you're there for a couple of weeks' holiday, and then overstay. While your passport will be stamped with an "admit until" date 90 (VWP) or 180 days (B1/B2 visa) in the future, it's likely that the information you give them at the immigration desk will be recorded, and if you stayed noticeably longer than you said you would, then this may well be an issue next time you visit.
(And, for what it's worth, when I last visited the US (early in 2020) they asked me when I'd last been there to check against their records; and my last visit was in 2011 -- so they keep their records for at least 9 years.) If they think you've used deception to visit the US you can expect a lengthy (if not permanent) ban from returning.
But to get back to the original question: My hotel accommodation was around $100/night (in February; that's quite a cheap time of year) -- and that was room-only, no meals. On top of that I budgeted around $100/day for activities/food.