not worth the hassle
https://kpmg.com/ca/en/home/insights/2022/12/pay-2022-interest-on-family-income-splitting-loans.html#:~:text=Taxpayers%20may%20want%20to%20consider,the%20loan%20is%20entered%20into.
Taxpayers may want to consider entering into income splitting loan arrangements with family members or a family trust, where the family member or family trust can invest the borrowed funds at a higher rate of return than the CRA’s prescribed interest rate at the time the loan is entered into. If properly implemented, taxpayers can effectively arrange for all investment income earned over the CRA’s prescribed interest rate to be taxed at the lower-income-earning family member’s tax rate while the loan is outstanding. However, before entering into a prescribed loan arrangement with a trust, taxpayers should confirm that the complex tax on split income (TOSI) rules do not apply.
For example, if a taxpayer's spouse is in a lower tax bracket, the higher income spouse can lend money to the lower income spouse to invest so that the investment income can be taxed in the lower income spouse's hands. To achieve this result, it is essential that the spouses have a written agreement that specifies the repayment terms and an interest rate at least equal to the CRA's prescribed rate at the time of the loan.
The lower income spouse must pay interest on the loan annually by January 30 of the following year (note that a loan created by unpaid interest is not a payment of interest). If the interest is not paid by the following January 30, the investment income from the borrowed funds will be taxed in the hands of the higher income spouse for that year and all future years.