All good advice albeit a little worrying,
We definitely want to make the move, the better half is well on board with the idea as well and in the long run I think it would be a better life. The worry is that you will never really know if the firm you are going to is straight until you get there.
Perhaps it would be better to try using the Express entry or PNIP programs rather than LMIA? At least then I wouldn’t be tied down to one firm.