you can cycle with uncured rock, you can cycle with anything you want to. the difference is going to be how long will it take. that will all depend on the condition of the rock being used.
on lighting, i had the same issue, needed strong lighting and i have a 118g corner so i was limited on space. i had to find something that would fit into a 25x14 space. coralife makes a retro fit with those dimensions, we didnt even have to move anything on the setup, just bend the sides in a little. they also make a non-retro fit kit that may work for you as well. i think its 24x15. it comes with either a 150w hqi MH and 2 65w actinics and 2 led moonlights. or one with a 250w hqi MH and the rest being the same. my tank is 30" deep and i still only went with the 150w seeing how it was HQI. it is a great light!!!! lots of glow effect with the actinics and moons.