DO YOU THINK IT IS DIFFICULT TO HAVE A POND IN YOUR GARDEN ?

It 's a completely wrong idea. It is neither expensive nor difficult to realize!
It's enough to dig a pool of 50-60 cm depth and covered it with a sheet of black polyethylene or rugged enough rubber, ground or stop the outer edge with some stonse and your pond is ready to accommodate the aquatic plants.
Plants can be grown in pots and there is no need to recycle the water.

Azienda Agricola Fabio Tesi 
   sale acquatic plants, paeonia, hemerocallis, typha, phragmitex australis, agapanthus, phormium,

 yucca, cordyline, carex, miscanthus, hosta, nymphaea, nelumbium