I've been through several smaller remodels.
Most recently, DH did our kitchen, except for the countertop which is solid surface and we didn't have the option to buy without installation. This is a hobby of his, which means it happened when he wasn't at work, and since sometimes he had to take home work to do on the computer or just wanted to spend "family time," then it took longer than absolutely necessary. On the other hand, since he works as hard as a cross between a demon/bull, it was done in about the time a contractor would have taken.
DH has also remodelled an investment house, moving around rooms, rewiring, rerouting pipes, building stairwells. He learned as he went.
As in...(me-away on business): I didn't know you knew how to solder?!
Dh: Oh I did't. I just went to the library and got out some books.
Me: What?!!

:
This remodel took A LONG TIME.
When I was single, I had my condo kitchen and bath remodelled. Key was friend of family who travelled from out of town and stayed with parents while he remodelled my place.
Agree with pp to take one room/ one chunk at a time. Stay involved. Have fun! And take advantage of the opportunity to declutter.