Travelling to US unemployed

[jackinthebox9 0]

Hi guys.. please help me with this issue..

2013-2015: Finished MS in Canada, recd 3yr work permit, multiple visits to visit dad (US citizen since 2 years) in US no issue
2016: Inadmissibility at Can-US land border due to no return ticket (as I was planning to even visit India for a few months after visiting dad for 2-3 months), end of Canadian apt lease, no employment, pending GC application in US, etc. Asked to carry return ticket, financial proof and proof of residence in Canada upon next entry.
2017: Started my first Canadian job in March, was allowed entry into US (to visit Detroit/Vegas but not father) in July without any issues, made 10-15+ one-day/overnight visits to Detroit via same border later without issues. Received Canadian PR in September (only have COPR in passport, PR card has been mailed to Canadian address after I flew to India). Left job in October to visit India for 3 months for family weddings and stuff.

Since I'm again unemployed right now, I have an opportunity to visit my father in SFO for 1 month which I can't when I'm working since it's 4 hrs away by flight, and flying there for 2-3 days isn't worth it. So I'm first planning to fly to the US with my mother (Greencard holder since 1 year and visited dad last year for 6 months) from India in January end  and then go back to Canada in February end. My mother would be staying back with dad. But I'm afraid my lack of employment would make the US officials suspicious again. I have my Canadian apt lease (April 2017-March 2018), utility bills, previous employment experience letter, bank statements etc. to show as ties to Canada but would that be enough? Would accompanying my mom, a greencard holder go against me as well as it may seem I might stay back with mom and dad? 

Infact, my mother isn't that fit, has had a hip replacement last year and I don't want her to travel alone for that reason as well. I'm also going to carry a return ticket (albeit to Detroit and not Canada) since I want to take the cheaper tunnel bus from Detroit to cross the Detroit-Windsor tunnel in Canada, as I live in Windsor.

Would any of the above create any issues? Is there something specific I should answer to any of their questions? Kindly suggest!