I have an old retaining wall that needs replacing. My question is how quickly do you have to install the new retaining wall after digging it out? I've had quotes by professional landscapers and probably about half the cost is for them to manually God it out. The space is too cramped for mechanical diggers.
I would go with ASAP.
Longer you leave it the greater the risk of collaspe becomes.
Important to get the founation and drainage right as they are a couple of the big fail points for retaining walls.
I would put this sort of job in the quote high in the hope someone beats you easily catergory.
Last year we had to get some retaining walls built and used experts. It was expensive but as Brad suggests, its hard work. Perhaps you could reduce the price by offering your own services as a labourer on the job?
Just wondering whether you've made any progress with removing and replacing the retaining wall? If you're still after some advice, perhaps adding a photo to this discussion might help community members see what you are dealing with.