Just playing with that now and that seems to the closest I’ve seen to YNAB that would still work on macOS. A quick play and it seems like it could be just the ticket! 
$50 seems very reasonable.
They even have YNAB4 and online YNAB import, though I think I’ll give it a go and the clean start to just give me the categories setup. The make it rain feature appears handy - though not sure if YNAB online had this feature.
Only feature that might be missing is that I can’t set payees - it just sets a memo. However, thanks for bringing to the table, as I think this could be a winner.