Nah, no need to have multiple nodes. That's what custodians are for. Have your node as your primary payment method, but keep a small amount with a couple custodians in case your node is down, so you aren't completely out of commission until you can get your node back up.

Am I understanding that you set up your Alby Hub with a 50k sat channel? If so, you would have been better off sticking with custodial lightning until you have enough to establish a few sizeable lightning channels (1m+ sats each).

You also don't need to have 3m sats to set up three 1m sat channels. You just need to have 1m sats and some additional sats to cover a few on-chain fees. What you do is open the first channel for say 1.1 million sats, then send all of that back to yourself on-chain using boltz.exchange. Open the next channel for 1.05m sats with a different channel partner, then send that back to yourself on-chain too. Finally, open the last channel with another partner for 1m sats. You can then send most of that back to your cold-storage if you don't want to hold much of a balance in lightning, and you will end up with more than 3m sats of inbound liquidity while only costing you the amount of 5 or 6 on-chain and lightning fees and two Boltz swap fees. Do this when on-chain fees are low, obviously.