Re: US citizens/residents/corporations and international taxation
Form a Bermuda corporation, contribute your foreign assets to that corporation and you can then repat earnings to and keep it in Bermuda. Just take vacations in Bermuda! voila you are vacationing on US tax free money.
When you need the money in the US just pay in just what you need. US will tax you BUT will give you foreign tax credit for whatever you paid as tax in Pakistan.
Also look up what countries Pakistan has tax treaties with.
BTW none of these may be an issue if the property and the rent are small amounts