The best and most optimal path forward will essentially be dictated by their wishes, and should take into consideration asset protection, income taxes and estate/gift taxes.

Do you have any tips on what to look for, or where to look to assess the quality of a particular market?

If there is a yes to either of these questions then you are good to go by either one person being on the loan and getting a gift letter from the other for the rest of the down payment, or being on the loan 50/50. 

Are there any investors that invested in Canada before how did it go and what are your tips about going on the northern border?

I had to call about 200 lenders (no exaggeration) to learn of 4 lenders who did this and I have some tips.

Tips?

If you don't have a parent or someone else that will loan/gift you the money for first-time homeowners, then you need a side job at least long enough to get that down payment.2.

Wondering if anyone gives gifts after a successful deal closes?

Also, I would be more than happy to help If you need any advice or tips in regards to the residential lending side of things.

With that said, I'm looking for advice/lessons learned/etc. from others with experience with industrial investing (either specific to the factors I mentioned above or just general advice/tips would be helpful as well).