i havent heard anything good about inside sun, i heard mixed up orders and slow delivery time. wouldnt go with them even though they sound like excellent deals. in the end you get what you pay for.
in your vegn stage NO FERTS! maybe a small shot at your 3-4th week for a nitrogen boost. so dont over do it, you will burn them up.
of course your veg time is perfect, actually it seems to be a bit longer than what we do around here, but then again the longer the veg period, the bigger the harvest. you also need to consider your space, so vegn to '50 inches may not be realistic.
you may want to consider veg time by week rather than plant height. and as far as a lighting cycle goes, most do 18/6. the rest period does wonders. believe me. what you can start at is 24/0 for 2 weeks then switch to 18/6 for the remainder of veg. thats just a suggestion thats worked for me.
most important be secure and good luck!