By the way, I am going to say that I have a problematic BTC address (or maybe a set of addresses) that concern me in terms of how it (they) was established and consolidated.. so still thinking about how to deal with some of my mistakes that were made.. and even hoping that there could be some ways to resolve some of my mistakes that were made.. but thinking and thinking.. without wanting to describe the particulars with too many details beyond just implying size and consolidation concerns.
You probably don't need help and will eventually figure this out, such as either ignoring the dust, or consolidating it all in one or a few transactions, loading up as many addresses or inputs as you can. But just in case, you can ask around here maybe someone knows what to do, or can do, or if its too much work or its possible.
If he isn't already using electrum he could export all the keys from his old wallets, then import them into electrum. After that he could freeze any problematic dust addresses, so they can't be spent from.
Either that, or wait until the fees are extremely low, then send dust spread across loads of addresses to a single consolidation address.