I'm more or less confined to a 2x5 tent as well, in a cramped pantry. My goals are similar, but striving to be more efficient that hopefully leads to better and better flowers. Basically, get everything right when starting instead of having to fix something every other week. I realize shit happens and you'll have to fix something sometimes, but getting to where the frequency is not as often would be great.
I've also never grown the same strain twice. I can only grow 3-4 plants at a time, in one spot, veg to flower and extremely lucky if I can knock out 2 grows a year. With so many cool strains out there, and not a lot of options (getting a clone would be like winning the lottery), I try to grow different shit as much as possible. I'm already super excited for my next planned grow as I got my hands on a CBD strain that has 0% THC and 25% CBD. If it actually grows out like that, again, winning the lottery.
Running soil with all the amendments, various bottles of nutrients, yadda yadda yadda, just became an ever growing assortment of crap and no where to put them. It was fine when I first started with a cardboard box, one plant in a 1 gallon pot, living alone with various places to store things and devoted attention. Now...not so much. Now I'd like to run it like a lab, where I can just precisely monitor everything and hopefully not annoy my significant other.
It should be an interesting ride, as long as I can figure more of this EC thing out and not kill these poor girls in the process.