I just sent K1 visa application for my fiance a week ago, but he said he wants to come here early, and
he wants to apply for B1 travel visa himself in the next few weeks.
Dose my k1 visa application affect his B1 visa?
-It is possible, but may not that much because K-1 visa is still a non-immigrant visa, and he does not need to report it in DS 160 application for B-2 visa.
Can his B1 application be approved if they know I have k1 application for him?-Not sure, depends on the IO.
If somehow his B1 visa got approved, can my k1 application for him also be approved?
-Yes.
( if he comes with b1 visa, stays for a few weeks, and goes back for k1 visa)
If he comes with k1 visa, but left without marriage, can I apply for k1 visa for another person later?-Yes, but have to wait for two years because this one is approved.
Is there a limit on how many times that I can apply for k1 visa?
-If you have filed two or more K-1 visa petitions at any time in the past or previously had a K-1 visa petition approved within two years prior to the filing of the current petition, you must apply for a waiver. To request a waiver you must submit a written request with this petition accompanied by documentation of your claim to the waiver.
If you have committed a violent offense against a person, USCIS may not grant such a waiver unless you can demonstrate that extraordinary circumstances exist. For details regarding those circumstances, see Form 129F.