I got around the first hurdle to plant the banana plant by getting one planted in my cousin's empty plot next door. No house yet, so no Vaastu complications.
I built a crude clothes washing area around this and slowly moved most of our laundry there.
Next, when I wanted to extend the filter to handle more soapy water, I wanted to plant more banana plants along with some Canna and reeds.
There is no dearth of banana plants in our locality, but another myth had to be broken. My mom tells me a banana plant has to be planted by an elderly person only. I thought hard but couldn't figure out why and she wouldn't tell. So, today, I went to a neighbor's place to pick up some saplings and the owner, an old lady also said the same. After much prodding, she said that there is a belief that people die soon after they plant banana, Banyan, Tamarind, etc.. I did not want to hurt her feelings, so came home promising her that I will get it planted by someone else.
My rather progressive aunt, who lives in a village, is visiting us and I asked her what she feels about this belief. She agreed that these plants and trees are planted by elderly people only, but the reason she gave was slightly different. She says it was more out of respect and the fact that elderly people would have done a lot of good work in their life and hence they 'deserve' the right to plant these useful plants. This was better. So, I went ahead and planted 3 of them (I think I deserve to).