roadrunner, I can't help but notice how green your yard is compared to your neighbors' yards...
Wow, what a difference!
How many times will you get a harvest in a year?
My yard use to look like his; here in Florida we have very sandy soil and if there's no rain all the moisture and organic matter are depleted very quickly, unless you water your lawn -- I don't water my garden, that's all from very spongy soil.
If you average it out, it probably averages one bunch per year (I'm guessing), but on occasions I've had two bunches and some years with none.
I started out with one very small plant, it grew very fast and produced numerous suckers -- sometimes I cut them down, just because I don't want a banana forest. In 2016 I had two plants produce, but lost one to Hurricane Matthew -- the plant was completely knocked over; I should have placed supports on it.
This year I have a total of six plants, ranging in size from 3 feet to the largest of over 7 feet, which has the bananas. I can see the second largest (over six feet) possibly fruiting later this year.
When I wash my dishes, I use the "dirty" water from pre-washing to water the banana plants and I rinse out oily/greasy dishes/pans in the mulch pit around the banana plants -- it's very difficult to over water banana plants and this is (I believe) the reason why they grow so fast, along with this area being the most fertile and heavily mulched of all my areas of the yard, it's basically like a huge compost area.