Is it permissible to take an interest-bearing loan from a Canadian bank to purchase a home for residence and work, given the absence of Islamic banks, the high cost of renting homes, and the intention to sell the home and donate the price difference to mosques upon returning to one's home country?

Usury is one of the major sins and is only permitted in cases of necessity. There is no necessity as long as dispensing with it through rental is possible. Therefore, it is not permissible to engage in usury if renting a dwelling is possible without excessive hardship. The intention to sell the house and donate the proceeds does not change the ruling of prohibition.