The author predicts that Mary's rental properties and his own properties acquired last year will generate strong cash flow within 5 to 10 years (i.e., between 2030 and 2035, based on the video's publication date).
"my guess is that in 5 to 10 years Mary will be making great cash flow on all of her properties just like I'm expecting for the deals that I bought last year them all to be offering strong cash flow 5 to 10 years from now as well"