There are banned accounts and then there are temporarily banned accounts.
Banned accounts are gone for good. Temp banned accounts may be worked, but will take 6+ months in order to clear them and start fresh again.
Just because you have the time and money, does not mean that a temp banned account will be workable. It's pretty much like buying the lottery. You don't spend more than a few bucks for those million dollar winnings. So, don't spend more than 1-2 cents on the dollar for what they could be worth. For example, if it was good and worth right now $5K, you'd pay about $35-$50 at most. Remember, Instagram accounts are FREE, so why pay for a shitty account and waste your time, when you can do that on a FREE account.
Hope this answers your question.