flooding,clogs the unexpected, to put things in prospective on average, how often do you have fix things that come up? like make adjustments,things like that? how many times you had a flood, more then once? what are the chances everything will run automatically without any assistance? I just know if anything comes up or happens what is your game plan? you must have right? 70days on an unattended inside grow is very risky imo...Humidity level can sky-rocket a number of things can happen..I just hope your looking at the whole picture..timers can stop working,plant can fall over, a fuse/breaker can go out, on say dehumidifier then what a fire? Like I said a smart tent is only way but there isn't any I know of that can do all them things...
I know for myself and I'm being honest here there is no possible way I could leave mine for even more then a week, maybe 2 if I had to really push but I'd be a total nervous wreck until I got back, not knowing if i'm even returning to a house...so 70day totally out of question for me...There are always things that come up, I've never seen a flawless grow where not a single thing come up that I didn't need to do something....Always expect the unexpected,plan for the worst...If ya was to have a flood and 55gal spewed out, can the area tent is in handle that size of a flood? the tent sure can't...I'm sure maybe you only thinking about floods & clogs but so much more can go wrong...I think of safety first....