The challenges of gardening are endless, @sanjeevm. Even so, I think they are very well worth taking them on, as I do not know if there is any healthier activity. Healthy on so many levels.
"And he promised me to pay only if I am satisfied ..."
This stood out to me, as it reinforces this man's understanding that a good business transaction must be mutually beneficial. The fact that he was willing to work with this understood up front speaks well for him and his impressions of you, as he must have decided you would not take advantage of his offer.
"Bhimsen appeared to be quite skilled, doing a lot of work, more than expected ..."
Under promise. And over deliver? It appears that you and Bhimsen both made a good decision. It was nice to see that!