How much should I pay to have someone upgrade a motherboard BIOS and install a CPU via Karrot?

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To be honest, applying thermal paste and swapping a CPU isn't a big deal—I can do that myself.
But since my motherboard is an older model, I need to upgrade the BIOS.
It can't be done in one go; I have to upgrade it step-by-step through several versions.
It's surprisingly tedious, and I got so frustrated when I got stuck that I just gave up. I've been leaving the CPU I bought sitting around for over six months.
Do you think someone would do it if I offered about 50,000 KRW???