Conventional financing requires that you have a SSN, Permanent Residency in the US, and a US credit score. 

Strategy 1: buy a duplex, live in one unit (for one year as a "primary residence) and rent out another unit as a short-term / mid-term rental on Airbnb.

I have never purchased an investment property before (although I do own my primary residence), let alone done a seller financing deal.

However, required downpayments were typically 40-50%, and would be difficult without a residency visa.

Must have solar, ev charger etc.My materials distributors are expecting more inflation.Homeowners insurance is still going up.I wholly expect CA residents to continue to move there (wished I'd bought there!

However while people in Windsor doesn't have the luxury of high paying jobs that GTA residents have, is it just a temporary fever of buying houses, or there is really something going on in this city ? 

For the son to qualify for the $250k exclusion, I believe he would most likely need to meet the ownership and use test, meaning he needs to own and live in the home as his primary residence for at least two of the last five years before the sale.

Generally, the only widely available pathway into RE investing with low cash is via househacking where you get a primary residence loan with a very low downpayment.

I have a buddy who offered sponsorship, but he has been doing it for over a decade and maybe only sells one house a year, and never to investors.

This would amount to about 4-5% of US residents and of a demographic which disproportionately rents multi-family and also SFRs not owns.