My brother in law's properties and philosophy is a great example of how this often happens.
He owns a number of rentals as well as a large property adjoining his home. He is always improving amd acquiring properties. I think of him as a "slum Lord with good intentions"
Anytime, and I do mean anytime, something of value comes up for free, at a discount, or in a bartering situation, his eyes become as large as saucers.
He is a "random pile of gravel" hoarder. This behavior also applies to random piles of dirt, random piles of lumber, and other random piles of shit.
He has a very neat home with a somewhat well kept yard, but his adjoining property looks like a junkyard.