1. Are those male pre-flowers? I'm NOT in 12/12 yet so keep that in mind and tell me what you think.
Hard to tell. It looks more Female to me but its early to see preflowers. It happens though. If there was a small stem with a ball shape on the end... that would be a Male. Those look more elongated rather than spherical but like I said... Its early to say 100% sure but I am leaning towards Female.
2. How soon should I be able to start budding my seedlings and at minimum how big/tall will they possibly get?
It depends on the strain really. Sativa's tend to be taller, Indica's smaller. I would say Veg until they are about 12"-15" tall, or about 5 weeks in. Flowering at 15" tall, the plant shouldn't get over 5 feet tall, Indica or Sativa, leaving you a couple feet for your light. That is if your not topping or anything else... which I assume your not since height is really not a big issue for you.
3. Should I bud my mother plants along with everything since I have no veg room right now? And will I be able to re veg them later? (They've already been re vegged once.)
Like you said, I think you should take a few clones and bud that mother plant. Like you said, make a small CFL/MH Veg box, never let the plant get real tall and you should be able to keep her around just fine. If your worried about your clone not making it, plant a couple. Any 1 clone you take SHOULD make it.
The other thing I noticed is that it looks like you have two plants in 1 bag?? It would be in your best interest to relocate one of them to its own bag/container before the roots really get going.
What will happen is 2 things. 1 your plants will intertwine their roots, increasing the probability of a root bound mess/death. 2, if the plants are calling for different nutrients than the other, it makes it hard (next to impossible) to give an amount specific dose to 1 plant. One of the 15 - 5 Gallon buckets you have sittin around would work fine
Oh and by the way, your room looks tight bro. I wanna say "Now you growin" but techincally just the walls changed... lol u were already growin, now it just looks like you know what your doing. Actually I am really diggin your setup, has went from being a little scattered (still nice) to a nice clean professional look. Props on a job well done +rep... Also you are gonna have a TON of bud... You got me hooked now- I`ll be checking back..