

Yeah, unfortunately that stuff is almost impossible to estimate. Inform your client that fixing the build will be a game of whack-a-mole where you’ll fix one thing and 5 new errors will show up. I would give yourself lots of time since you’ve never worked on Maui (? You didn’t say that in your post but if you’ve never heard of xamarin, i’ll assume maui is new).
I would break your work down into two milestones: a) compile and run, b) fix all the busted views. It should come to no surprise that a) will be hard to estimate so give yourself lots of time, and b) will be easier to estimate because you’ll be able to review each View and determine what kind of fixes you need to make.
Good luck
Well, I hope they have insurance.
Thanks, I’ll see myself out.