Questions - travel authorization and work authorization document

[nesta37 3]

I am currently in the US on a L1 work visa since august. End of october I married by boyfriend (US citizen) and now we are preparing to file for the adjustment of status. And I have a few questions:

1. How long does the process take on average?

2. Since my L1 visa is valid for 2.5 more years - do I even need to do the paperwork for work authorization? And if I don't do it can I still do this later on? Say I loose my current job (not likely at all but worse case scenario), can I then apply for the work authorization ?

3. The travel document.So does this mean that as soon as they receive the package and I get a NOA1 can I then not leave the country anymore until I get the travel document approval? Just want to know in case I need to do a business trip as my employer does not know about this application.

4. we had filed for a fiancee visa in may and received NOA 2 but didn't move further on this since I received this joboffer, we send out the letter to cancel it, but is this something that I need to mention anywhere?

5. One more question - for the affidavit of support will it be an issue that my husband works as contractor job of 6 months? and if so how much assets do we need to proof? and can my savings or income be counted too?

I don't worry about getting approved since we have lived together for 5 years and have 2 kids together, but with me being on an L1 visa I just worry that now us being together as a family depends on my job, which I don't like with having 2 kids.

thank you