I see you already have a channel of 897k sats CAPACITY. That is a good channel for a private node. I thought it was smaller. But is OK. The 51k blocks is the TIME you want to keep that channel open. I would choose max 12 months.

If you really need more inbound liquidity, just buy another channel and keep also this one. I suggest to have it with another good LSP, just for more reliability. But if this capacity of almost 900k sats is enough for you to receive and spend or swap out, you don't need anything else.

In LN you have to think a bit in advance, about your future use of that liquidity. If you expect that is enough, just use what you have. If you expect a larger volume in the future, is good to have ready in advance these inbound channels, buy them when the fees are low.