Sounds relatable. Last time I moved I even had several people offer in advance to help but I ended up doing almost everything by myself because I just wanted to be able to do things at my own pace and make sure I was happy with where everything went.
I'd recommend having a furniture dolly and an upright trolley rather than relying on an office chair though, proper tools make the job much easier.
I never had a bike stolen even during the few years I was using one as my main form of wheeled transit. It helped though that I never had an expensive bike, always locked it up when I left it (average cable lock), and had somewhere secure to leave it at night.