@Jack ***************
if you have any interaction with the police while you're on overstay, maybe a normal police checkpoint on the road when driving around or anything, they'll arrest you, deport you and ban you from Thailand for 5 years.
There's also been a recent crackdown on overstayers and they've sent police to people's houses looking for them for even just a few days overstay.
Is it likely to happen? Probably not. But is it worth being banned for 5 years to make it more convenient for you? Is flagrantly and purposely violating the law of a country you want to live in long term a good way to get started there?