Is it fardh to work?

Q: I have a question that needs to be answered and it is bothering me so much.

1. I have read that there is a hadith which says having a halaal job is fardh, but I have read some say it is not saheeh? (Kindly clarify this to me) If so, then it is not  fardh to find a halaal job?

2. I have read someone (maybe a sahaabi, taabi'ee, Imam etc.) said: "Working for a living  and helping the poor with his earning is better than praying (worshipping) all day/night without working for a living". Kindly give the name of that person who said this if it is authentic?

3. Once it is a fardh act, we must exert effort to do it and find a way to achieve it.  If someone is procrastinating in doing a fardh act (which he fails
to do) he commits a major sin right?

4. Continuation to 3. If finding a halaal job is fardh, then it is fardh on a person to  exert effort to find ways to achieve it right?

5. And whenever he intentionally stalls in achieving it (halaal job) he commits a major  sin right?

6. And in my case, I am currently in college taking a course in allied medicine (my  choice for a halaal job) and in my 3rd year (2 years to go to
graduate). I sometimes feel lazy and procrastinate in studying (I sometimes do not study) which places me in a brink of failing (stalling to graduate and
achieving a halaal job). In this case, did I commit a major sin?

7. Also if a person does not do this fardh command (have a halaal job) and dies, does he  have the same punishment like those people that do not do
other fardhs (salaah, zakaah, saum, haj etc)?

8. If someone decides not to work, is it sufficient to just place full trust in Allah (tawakkul) that He will provide him and his ageing parents food/drink
everyday?

9. And lastly, the Ahlus Sunnah ulama all agree that if someone doesn't consider the kalimah, 5 prayers, zakaat, Ramadhaan, Saum and hajj as fardh, he becomes a murtad(correct me if  i'm wrong). Likewise if someone were to deny or don't believe that having a halaal job is fardh, does he become a kafir?

Women visiting the graveyard

Q: I need to know. Can a woman go to the graveyard for ziyaarat? Did Hazrat Aaisha (Radiyallahu Anha) go to the graveyard for ziyarat of her brother. First Rasulullah (Sallallahu Alayhi Wasallam) said don't go and the he said you can go to Aaisha (Radiyallahu Anha). Can you please explain me about women and children going to the graveyard.

Waleemah

Q: If anybody with sadqa intention give marriage food is it allowed or not? People who are eating this food do not know it is sadqa.