Not terribly expensive, depending on one’s budget. 
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Discussion
Not at all really
Remember, the conversion rate is not accurate. Although the market sees that 16k sats is equivalent to $6, in actuality, it is much much different.
It will take a long time to reach an accurate conversion.
Few
16ksats = ~$16k usd
As a node runner, would you say that it is expensive to keep up with your inbound liquidity (I am obviously a noob, embryonic stage, but plan to run a node when our business begins to allow it).
What do you mean by "keep up"? Finding inbound liquidity or balancing channels?
Or were you inquiring about something totally different?
BTW, it doesn't matter if you're a noob or not, every question is important 😁
The biggest problem I'm facing right now is opening channels under these high on-chain fees.