welcome, Buggy
I like to 'pop' lots of seed and pick the best to grow. Of course when I buy seed from the vendors I really can't afford that, only with 'free' seeds.
You can grow 16 or more plants in a square meter space or you can just grow a half dozen. This depends on the pot size and how long you're going to veg them. Basically, you'll want to fill the footprint with pots. I use 3 gallon bags for sea of green and 5 gallon pails for larger plants. You can use larger or smaller.
A 10 foot x 2.5 foot space will require a lot of lighting and ventilation. Use reflective panels or tent to corral the light.

Check out some grow logs that feature similar methods to yours. here's one of my recent grows. And another

Good luck~
Shovelhandle Reviewed by Shovelhandle on . Oh great, apparently we're growing now! Hi all! I'm a total newbie at this whole thing. And, I'm not even going to be using! We're looking into the details of getting my husband a medical use licence in our state, and while on vacation out of state he tried pot to see if it worked for his pain. It was GREAT. His pain is usually 8/9/10 but the pot brought it to nearly NOTHING! WOOT! Nothing we've tried from the pharmacy worked even a third as well! :D BTW, he's had pain from scoliosis and then a spinal fusion surgery 20 years ago, but Rating: 5