snowballing into spring

So suddenly we are totally re-landscaping our yard. Surprised? So are we. But you know how it goes.
*We need a shed, since we have no outdoor storage and Husband’s parents are moving all their belongings into our house.
*The foundation of the shed needs two tons of rocks. Which will be delivered by a huge dump truck, totally tearing up the yard.
*Then the shed will also be delivered by a huge truck, which will again tear up the yard.
*So we’ll need to replant the grass on that half of the yard. Which is – ironically – the only part of our yard that actually has grass. (Most of our “grass” is actually dandelions.)
*Since we’ll be replanting that half of the yard anyway… the other half of the backyard really needs regrading and replanting.
*So we might as well do that.
*And since the front yard is seriously almost entirely dandelions – seriously – we should probably reseed that as well.
*Plus, we wanted to add a flower bed in the front yard, by the driveway and build up our current flower beds, which are looking sorry. And since we’re getting all that dirt delivered for the backyard, we might as well do the beds now too.
*Which means we need some more plants for the new bed, as well as a couple of shrubs, some groundcover, etc.

So all that to say, we are suddenly relandscaping our whole yard. How does this happen? Do other people’s home improvement projects snowball like this?