Is it easy for us to immigrate to Canada under such circumstances?

If you don't have much money, you can apply for skilled migration. Now the time for skilled migration is much shorter than before, but the conditions have improved. But judging from your situation, it should be 67 points.

If your husband graduated from mechanical engineering and has been engaged in this field, your husband can be the main applicant, and your educational level can give him extra points. If your husband is currently signing TRV in Canada, he can submit an application to Buffalo, USA. However, considering the need to wait for two years after the application is submitted, and he may have returned to China when the supplement is made, it is recommended to submit it to the Hong Kong Embassy.