I think even in small yards it's better to have a couple of upright trees. For pomes (apples, pears etc) in Australia we're seeing most nurseries now sell the

I think even in small yards it's better to have a couple of upright trees. For pomes (apples, pears etc) in Australia we're seeing most nurseries now sell these on M27 (tiny footprint - will grow to about the size of a human), or M9 (bit bigger but still quite dwarfed). 3 x M27 grafted apples will take up the same (or less) space than a single standard multi-graft tree, but be easier to manage, be more resilient, while still giving you the longer harvest season & variety options.