thanks, that's how i made one of the accounts!

Yes that option is good but is quite limited in functions. For few family subaccounts is ok but when you want to control the liquidity you do not have too much features, that's why is better with lnbits.

One interesting thing with BW lndhub app is that the sub-account can use the funding wallet feature in Bluewallet, using the onchain address of the node. Be aware that is always using the same address.