Originally posted by Cristina's Way:
...it seems pretty clear that Vito gave Michael control of the purse strings. When Connie announces to Michael during Anthony's party that she and Merle are getting married and would like to book a passage on the Queen, she states that she came to Michael because she needs money. ...
All this and much of the blathering that follows is correct, but none of it indicates that Michael cut off funds for Fredo once he disowned him in the boathouse. (Unless you can dream up a 'draft script' scene for that).
Connie & Merle's excurstion on 'The Queen' was a fringe extravagance and it makes sense that she would need Michael's help on that. With regards to simple living expenses both she & Fredo would probably have remained very comfortable.
And that's wonderful if you really do care where Fredo lived after being shut out by Michael. Since there's no suggestion whatsoever as to the answer then I suppose you are free to use your imagination.
Apple