General Green Card
I am currently waiting for my final visa interview since my priority date became current just last July. The target date of the interview may be between December to May (6-9 months from priority became current, right?) As of the moment, my civil status is single but I'm planning to get married soon but the schedule might be only after my final visa interview. Will I still be able to include my husband in the petition? If so, what should be done and what will be the range of months for the processing time?
It is difficult for me to plan your course, but the law is relatively simple. If you get married BEFORE green card approval, your spouse is entitled to "follow to join." That process tends to be quicker than if you get married after you get the green card approval.
Can I get K visa for my spouse? I am a US immigrant with green card. Is there something called a V visa?
V visa no longer exists. There is no K visa option for green card holders. Sorry.
Is it a problem to travel outside the US after the temp GC has expired, and assuming the I-829 wouldn't get approved by then ?
When the I-829 fees receipt is issued, it should state that your green card is extended for one year and travel and work during this time is permitted.
What happens if green card expires while away on reentry permit and it's not possible to stay and return to USA to renew?
You lose your green card status. Reapplying or trying to get a returning resident permit would be the only two options that I can think of.
How can a artist get a green card?
Basically two ways: through a job offer in your field OR through your own qualifications, but only if you are nationally or internationally famous.