The L3901 is virtually identical in dimensions to my L3800 and its really easy to get in and around in tight spaces. Great sized machine that will do everything you want. Write that check and don't lose sleep -except for waiting for it to arrive!
As I said, I used mine doing a yard remodel at my home. We maneuvered to moved 60+ large boulders, and did other work in incredibly tight spaces. Sounds goofy but, its small enough to get most places, but big enough to do the job when you get there.
Here is mine doing the job in pretty tight spaces...