You see, no one wants to buy a house that is cluttered with junk like this. To most folks, a spectacular garden says one thing - weeding nightmare. And most folks are right. We had a spectacular garden in Virginia and it was a maintenance nightmare. We went away on vacation more than once, only to return to three-foot-high weeds. And stupidly, we replicated this (on a smaller scale) in our vacation home in New York. Do the math on this: garden + vacation home + vacant for six months = yard-high weeds when you get back.
It is just cheaper and easier to have simple plantings that do not require a lot of constant maintenance and intervention. The "showplace" home with spectacular rose bushes (or whatever) is not worth a penny more than the house with ordinary shrubs (that need trimming once every other year, at most).
My friend who does the shitty little projects complains all the time that he is broke and can't afford things. "I can't afford to replace my old car" he sighs, while forking over money to his hired hand and writing out a check to VISA for the latest load of mulch he bought last week at the big-box store. Maybe if he got that plastic edging to go around the new plants? Hmmmm.... that might look nice!
It is very easy to get caught up in these sorts of projects. A house can be a real money pit if you let it become one. In a way, it is like teens and 20-somethings who squander money trying to "mod" a car while ignoring basic and essential maintenance. The secret, I think, is to think of your home in terms of a landlord - and perhaps after being a landlord, this is easier to do. When you own a number of properties, the idea of high-maintenance "improvements" loses its allure rather quickly. What does appeal to you is reliable appliances and infrastructure that do not require your constant intervention.
I want to do things not own things at this point in my life. And I certainly don't want to bankrupt myself by spending every weekend dragging home crap from some big-box store and laboring in my yard.