Closet Set up Multiple Questions

I have a 4x2 closet and was wondering what would be the best thing for mounting a fan to the wall. im going to get an air exhaust when i get my hps system.

Also I have 2 ladies that just started week 7 in veg stage, i recently added 2 that are in week 1-2 of veg. would it be possible for me to keep the cycle going until week 10 or so for the first ladies?

Any pointers at all would be helpful.

Thank You

You can keep them going as long as you want but they will grow. Can double to tripple in hieght during flowering so try and calculate possible height before you outgrow your space. You can get a regular small oscillating fan or desk fans. Some can be mounted on the wall.