Need any advice/ideas for my new grow room.

I realize this is an assortment of questions but id appreciate it if anyone could clear some of these up for me as i just moved into my new place and have my own soon to be green room.

This is my 3rd indoor grow but the first of this magnitude as I have just moved into a new city with much better ordinances =D I have a 20'x14' area with 2 high windows at the end on either side of the room. The ceiling is 11' and above that is a little bit of an open area besides the beams and posts running across. This is on the 2nd story of the building which also makes irrigation/soil a burdon for me as well.

I am planning on running 2 8-bulb 4-ft t5's on top of one another for early seedling/clones and early veg and figured, given the height is 11' height. Next I plan to move them under a 400-1000w MH for vegging. In my flowering room I plan to be running 1000w HPS

I am able to do 25 plants in my county so I am shooting for this number both vegging and flowering to maintain a perpetual harvest cycle.

The things I'm trying to figure out are:

~Should I keep a few mother plants myself for easily accessible clones and proven genetics?

~How much of this area do I section off to make my veg and flowering rooms to ideal sizes?

~After I move my plants under the HID lighting from the t5's should I transplant them into 3 gallon pots then, or into a 1-2 gallon pot and then transplant before flowering?

~Would 3 Gallon pots be sufficient throughout the flowering cycle or given my height dimensions(11') would you allow for a longer veg and flowering cycle?

~I was wondering if anyone had advice as to if 1000w is overkill during the veg cycle or should I go with a 400w or 600w instead?

~What are some trays and gardening benches to look into?

~What is the best way, in my situation, to irrigate upstairs? A reservoir/tank or switch to hydro entirely to eliminate having to deal with soil all together?

~What are your thoughts on co2 generators? I'm pondering the idea of dropping the money on one.

~I was also wondering what peoples thoughts were on the botanicare nutrient line, I was gonna go with the entire line of Botanicare again as I've had great results in the past.

-Pure blend pro grow/bloom, liquid karma, hydroplex, silica blast, cal-mag plus, clearex(flushing), and power clone(cloning). I was also thinking about checking out their new line of molasses derived "strapped" product but wanted to hear some feedback, thanks!

Your space is much bigger than my area but I do run 1000w so I will offer a few ideas. If I had your space I would run a few 1000w at least for flowering.

-I just take cuttings for clones before plants go into flowering to avoid needing moms.
-A large flowing room is good, think about your lighting for size of space. A 1000w HPS is good for a 4x4 or 5x5 area with my past experiences.
-I transfer from 1 gallon pots to 5 gallon. I think its better to do less transplants.
-I do my vegging under 8 T5's and into the 1000w hps for flowering
-Build any bench's or shelving you may need. Under my pots i just have little plastic trays from garden store.
-Just use a watering can and mix as needed. If you want to go hydro than thats a different story.
-co2 is good but requires a lot more precise controls and preferably a sealed room. there is DIY ways to creat CO2 if you need to know more
-I have heard good things about botanicare but no experience personally.
-Also IMO do not use molasses, i find it changes the natural flavor

this is all based on my person experience and you will find many different ways to do things and what works for you.

Good luck