Really that is a supper encouraged thing!You can't have the form signed if you haven't yet received an invitation to apply.
Wage might be a problem because one of the requirements in the job offer stream is that the job wage offer must meet the provincial median for that particular position.
What program did your wife finish in this Toronto college? When did she finish it? Is nuclear electrical engineering the only job you can do? Can you diversify into other technical fields?
Immigrating at an "older" age is still possible, although very hard as compared to much younger applicants. You have to know which cards to play and be ready to play all-in. Use the maximin and minimax principle in game theory. I was 50 when I got my OINP invitation, and 51 when I applied for my federal PR. So technically, yes, still possible.
My wife got one HR management Postgraduate Certificate(2022-03) and one Comercial Bake Diploma(2023-03)(this one does not have a degree requirement) so she could not get 5+5 points. only 5 education points.
Yes, I can do all the electrical technical kinds of stuff, designing and drafting. Right now I am an electrical designer full-time working for an Engineering consulting company. NOC 21310.
Right now I am even considering whether should I go to get the Master's Degree.