if you cancel a building to get the money back you will loose whatever cash is over your limit, when i bought the special with gb and 22million cash it went over my limit. cant remember how much i had before i got the 22million but my bank limit was 39.1 million and so after getting the 22million i had 44.5million. not sure if that was where it cut off or if it was the 22million + what i had in bank. maybe it will also go over if you swap gb's for a cash amount, havent tried that yet