Is it possible to get permission to come to the US while im fixing my visa in Mexico?

depending on where you are in the process of "fixing the visa" it is possible if she is otherwise a low risk to overstay her visa here in the US...

How to work in the US coming from another country - only H1-B or H2-B visa option?

H-1B visa is not a fast visa, not by a long shot. H-2b only applies to seasonal work. Has she looked into J-1 programs for hotels?

a common argument that we make for these types of cases, where you get two shoplifts, but aren't convicted of either before you commit the second...

Will it be best to get an attorney to look at the case and go with him just because of the nature of the case?

Yes., Absolutely yes. Tell him not to answer any questions also.

If someone came here illegally, would they qualify for the 485 form and waiver?

Qualified for a green card? Does that mean that someone petitioned for him back then? Generally,, the children over 21 or US citizen spouse would...

What's the best thing to do? wife and daughter are US citizen Would this help his case? can my attorney guarantee my citizn?

Everybody is correct in saying that no attorney can ever guarantee an outcome. If he/she does, that person is a liar. This is particularly true...