I've got a setup almost exactly like this that I need to do a thread on. I'll get to making it at some point. I love my tent!
I've got mine more tuned for an intermediate setup, however. I live in Vegas - and I don't use portable AC - so I have to use a DIY swamp cooler to drop temps from a max of 85 during the day down to around 74 (during the summer) and 65 (when able, during the winter) all night. The plants have responded well since my older ones had come from a sealed terrarium with barely a temperature drop to speak of at night (again, Vegas).
The swamp cooler is the only option to cool a tent like this without doubling my power bill and I feel it works very well. The added humidity it produces is nice (household is 15% humidity year round, air exiting the cooler is around 50%. There are precisely 0 ways to acclimate my plants to growing outside of a sealed enclosure). It is also regulated via a Zoomed Hygrotherm and I've experienced no problems with it.
Humidity itself is regulated with a walgreen's ultrasonic humidifier and is set at 65% year round. I feel it is counterproductive to set it higher than this because any time the fans engage on the swamp cooler the humidity is dropping to 45-50% in about 10 seconds. I feel like the lower I can get the plants to acclimate humidity-wise, the less humidity shock they will go into when the cooler engages, especially during the height of summer. Because of this, I hit a cap of only about 75% humidity at night and thus experience no condensation or leaking water issues. I feel that this is not a bad thing.
I keep a towel on the floor as sort of a rug/way of catching stray water from watering, but I have no issues with water leaving the tent. I have more issues with the swamp cooler overflowing or dumping its water onto the carpet.
You lucked out being able to go with T5's and not have the tent overheat! My tent will hit about 90 during the day with 6 t8 fixtures running. If I could upgrade, I would, so you definitely did good there.