There has been a relatively new atemoya  cultivar released in Australia, called "Tropic Sun". They are marketing this as an "ideal backyard" tree. I am assuming they have grafted this onto A. Squamosa  rootstock for the dwarfing characteristics.  It's not the case with mine that's for sure, mine are definitely grafted onto Cherimoya. I believe they have at least two rootstocks to cater for temperature differences in the country, A. Squamosa for tropical Australia and A. Cherimoya for the rest of us.
 In summing up, if A. Squamosa is plentiful in your area, you could consider marketing it similar to above, or do you have any restrictions on importing Cherimoya seeds into your country? One last thing, it would only take three/four years to get a producing Annona tree there anyway for your own seed production.

I'm in a warm temperate area here and it takes around 4 years.
I'd assume you could just about cut that time in half in the tropics.

That's exactly how it's done, only thing is. if you have different cultivars, it's a nightmare tracing the vine back to the roots if you want to ident the fruit.

What you have there are flower buds. They should open shortly. Suebelle has been known to be "best home variety"
A vast majority of cultivars are pollen sterile, I don't have a Suebelle, but I've read they are a "regular producer", so I'm assuming they are self pollinating.

Added email to my profile so I can now be contacted direct.

Cheers.

If you know the difference between  a male and female flower, you are half way there. If not there are plenty of youtube vids out there.
The most famous cross is between A.Squamosa and A. Cherimola ie  A. Atemoya.
You can collect pollen from the opened male flowers of one species and keep it in the crisper section of your refrigerator overnight.
Then go looking for newly opened female flowers the next day. To protect your handy work, I'd cover the newly pollinated flower
so as to not let any stray pollen in and undo your work. I find that a small artist paintbrush does the job well.