Northern Lights Auto Seedsman

Buds are really starting to fatten up and the scent is getting a little stronger. #1 is definitely looking much greener and healthier all around. Only issue was one morning one of the larger colas started exhibiting signs of bud rot or something (see photos). It was just affecting the very tip of the cola so it was removed and the area was cleaned of all bad looking bud/leaf. Haven't ran into this issue before while still growing (only seen after harvest when too humid and hot) but the one cola started looking a little discolored and the leaves were getting really yellow/brown and moist/rotten feeling. It has been a few days since removing this affected area and things seem to be alright elsewhere on the plant and no signs of this anywhere else. When cutting that affected part of bud off the plant, despite being not the best it still had a very pungent fruity aroma which was nice. Hopefully this emerges more in the next week or two before harvest #2 is still going strong and has been very resilient to any issues. Not too much changing other than the buds fattening up a little more and lots of frost coming in on all the buds. The bigger main colas are rather thick and seem pretty dense. When checking trichomes of each, very few amber trichomes are starting to emerge but it is predominantly milky now with a decent chunk of them clear still. Seems more and more clear and less milky each time they are checked. Slowly observing more amber each time but really only a few here and there not enough to harvest yet. When checking the trichomes, the buds are very sticky!! Planning to harvest in the next week or 2 once almost all the clear trichomes become milky and there are a few more amber ones observed. Praying no more issues with the bud but at least it's good to know that there is a good percentage of milky trichomes if it has to be chopped in an emergency so it should at least be mature enough to produce something. Just set up the drying tent but having trouble getting it below 70F. Only portable AC units seen are $500+ so really not looking to spend that. Any other ideas would be greatly appreciated. How do you guys get your rooms down in the 60s or as close to 60 as possible for drying? Getting the 55%-60% humidity will be no issue. These next few weeks are going to drag out probably lol too excited!