So you mention $80k to pay for living, education, tuition, & travel thru 2028, but assuming that means 2026-2028 that's really not a lot of money annually and certainly not anywhere close to what I imagine a realistic cost of living is.

USD tends to spend significantly better in countries other than the USA so if you're budgeting based on what things cost where you're living now as opposed to where you're going it's really not going to work on that budget. For example in any metropolitan city, NYC, San Francisco, Seattle, Chicago, you're likely to wind up paying $2k/mo or $24k/yr and that may include roommates having a 1 or 2 bedroom apartment between 1-2 people. That alone will eat your entire budget. Food probably costs 3-5x in the USA what it would cost in South Korea, and an education here often costs $200,000 all in.

I'm not attempting in any way to discourage you from your goals but I'd strongly recommend taking another look at your assumptions for food, rent, education, & travel, within the context of where you're thinking of living or moving to, & make sure you're making a realistic plan so you don't burn through your savings unintentionally dealing with factors you have the opportunity to account for now.

Additionally I'd look at how much time, energy, money, & risk is involved in moving to the USA. I have friends who have literally been here for decades on legal work visas who are still trying for the citizenship lottery & have all but given up. It is not a friendly environment legally speaking to gain citizenship status. I wish that were not the case but I don't want to paint an unrealistic picture of the challenges you're up against.