How many fruit trees and bushes for a family of four?

My son and daughter in law (DiL) are looking for housing and are likely to end up in a suburban area on a relatively small lot (compared to our farm, which by farm standards is still relatively small).

That got us thinking about fruit trees, and how many it would take to feed a family. How many would it take to feed a family and have some to share with the neighbors?

Yes, this will be specific to ecosystem, but I thought I'd start us all thinking about answers to that based on where you are, and what your family likes to eat.

Our farm has 3 productive apple trees, but two are summer fruiting and the fruit doesn't last. We have two younger trees that produce later, but they didn't get the care they needed when young so are not producing.

We have 4 plum trees, but again, 2 are the same variety and produce fruit that doesn't store and it too juicy to dry. Two are good for both eating and jamming and the latest producing one is good for both jam and drying.

I have a peach tree and a baby nectarine tree. I have a fig tree that's desperate for its forever home. These fruits need to be dealt with when ripe and don't keep.

We have a cherry tree, but might as well not... the birds and squirrels harvest it long before the fruit is even ripe. I understand there is a type of cherry that may not actually be a true cherry, but that the animals aren't so keen on?

In the berry direction, we can grow strawberries, raspberries, blackberries, some grapes, currents and hardy kiwi.

My DiL would love some of the heat-loving fruit, but most of them are borderline in our ecosystem, and will require a warm microclimate and a way to protect them for the occasional year that is below average.

So what would you plant to feed a family of 4 in your ecosystem. What would only be good fresh vs easily stored? What would require processing to keep through the seasons?

In theory several trees will suffice - if they are 20 years old, standard size, and are fit for the site's soil and weather.
The reality is more brutal. I have already planted around 300 trees, 100 died, they are growing slowly and just produce enough to get a taste of the fruit. Sometimes they struggle to grow, sometimes they die after 3 years or still produce nothing after 6 years. Way not enough for overeating or any processing. I keep planting and I'm patient and there is more and more every year. That's the price of experimenting in a microclimate and planting tress on standard rootstock with long lifespan, but I like it.
So my advice is - plant as many of everything as you can fit.

I can mention our experience with bushes as the the fruit trees are too young to produce currently. Also, our current goals do not include preserving excepting freezing. One day...

There are 8 of us. 2 adults, 6 kids, 10 and under. In our climate, the strawberries fruit first, then the raspberries, then blackberries, then blueberries. When I say "make fruit" I mean that it is ripe and we can eat it and there are some fruits before and after the times I mention but they really produce during the times I mention.

Strawberries - They are in different places but if we combined them, it would be a 24'x30' patch, roughly. They make fruit in April, May, June.

Raspberries - We have about a 16" wide by 16' long patch. They make fruit in May, June.

Blackberries - We have 6 large bushes and they make fruit in June and July. Plus the wild berries around our tree line perimeter.

Blueberries - We have 16 bushes and they make fruit in mid-late June and July.

All of the cultivated bushes/patches are 2 years old. We all graze as desired when walking around the property. The kids are able to go and eat as  much as they want anytime of the day. We are intentional about using them in meals and smoothies. We freeze the excess and this will get us through until September/October timeframe.

This seems to be the right amount for us to eat as much as we can stand for 6 months per year and we enjoy the natural process of going from one type of fruit to another. I am supposing that as the kids appetite increase, time will increase the size of the bushes/patches (production) and it should be about the same but I am not certain at this time. We do not need to supplement our diet with any berries for that 6 month period, at least.

So for 6 months a year, eating mostly fresh and some frozen, this is where we are. The bushes and strawberries are comingled in with a bunch of other stuff along swales, in garden beds, medicinal plant beds, among the fruit trees and misc. vegetables we grow in the ground. The raised beds are currently dedicated to vegetables and some flowers but I would like a raised bed, maybe 12" high instead of 24" for a nice strawberry patch.

The strawberries grow year round here and get our of control without some managing. I think I could do a better job with management if they were in a dedicated raised bed. Or maybe 2 beds to keep a steady rotation going between 1,2,3 year plants.

The berry bushes seem to all be happy and we are happy with their location as they just need a little pruning from time to time. The raspberries and blackberries need more attention than the blueberries but the meat rabbits love them so they get all of the pruning's.