GC for sister's minor(currently) children and spouse

[Jilebi]

Hi folks,

This is an awesome forum, that I have found today! Thanks for letting me participate in this community.

I am a US citizen, who acquired US citizenship through naturalization in 2008. I would like to sponsor my sister(age 45), her two children(age 17 and 15 respectively) and her husband (age 50) for green card. I understand I can do this through F4 category.

Knowing that PD for F4 is 11 years currently, I had the following questions.

1) F4 category definition states it is for brother/sisters and their spouse and 'minor' children - What is the definition of 'minor' children? Is it under age of 21 at the time of I-130 application or is it under age of 21 at the time of GC issue(11 years from today)?

2) My sister/her children/her spouse currently have a 10 year multiple entry visitor visa. They have already traveled to US 2 years ago on it. If I apply I-130 for them now, over the next 8 years of the visitor visa, can they travel to the US? Will they face any issues at port of entry next time, since I would have applied for I130 for them by then?

3) When my sister/her children/her spouse go in for renewing their visitor visa after 8 years, will the fact that they have an immigrant visa application filed on their behalf, prevent them from getting a visitor visa? Anybody have any personal or even anecdotal experience on this front?

4) If my 2 nephews wish to get a student visa to study in the US over the next 8 years, will the fact that they have an immigrant visa application filed on their behalf, prevent them from getting a student visa? Anybody have any personal or even anecdotal experience on this front?

5) If the answer to 4 is YES, I would like to not apply for GC for my nephews. Can I decline to do so in the I130, or do I have to mention their names in the I130 form? The reason I ask is that in Q17 in the form, it asks to list spouse and all children. It does not give an option to select/deselect children of sibling. Where does one choose if children of sibling are being applied for GC?

I realized these are detailed questions above, but I am certain others in the same boat as me must have gone through the same experience. Any help that can be provided by all of you on this forum will be sincerely appreciated!

Many thanks in advance!

[immihelp]

1. 21 at the time of getting GC, not now.
2. They can travel. They may face issues.
3. It would be very difficult to get visitors visa with pending immigration petition.
4. Same as #3.
5. You can omit some.