But where did your 10k originally come from. Did it grow from a tree? Did you earn it? Why was it not reported on your income tax documents?
You are overthinking it. Especially in the US where you lot are 100yrs behind the rest of us with digital payments and tracking. The fact is More people are caught doing shonky tax returns for dodgy shit than money laundering.
I’ve been audited 3 times by tax authorities and beaten them 3 times and I was messing with a whole bunch of shit. Play the game at the checkpoints. Buying a car for 10k cash doesn’t do jack but claiming depreciation on a car for tax purposes, then selling above its value and lodging that value with the buyer gets you caught because you didn’t claim the capital gain 😉
The key is to create an easy simple lie. Notice how most on here went down a path of a complex lie, many data checkpoints for getting flagged etc. meanwhile my strategy created 4 data points, car at a small buy value, a house for small value, a sale for renovated house but tax free gain as you live in it and then a new house buy value. Piece of cake for me. Likely big fines and charges for the rest with their thousands of data checkpoints.
The more checkpoints = more chances you stuff up. Hence simplest is best.