Tent I use.
I have a few USB humidifiers made for a desk (though I have no idea how they're supposed to make a difference there) that aren't available on Amazon anymore. I don't have any control system for them, they run constantly. So it's more about increased, rather than controlled humidity, as they're in the tent instead of in a window in my house in Maine, where the humidity is somewhere around 15% until summer.
Have you seen these?
My tent has 2 separate compartments. What I purchased so I should be good. Both sides are completely blocked off.
If you can square away the size for one of those all-in-one tents that have a space for seedlings/clones + veg/mother and flower... that’d be the perfect perpetual grow.
Something like https://www.amazon.com/dp/B07HQHG311/
Little short though
If you wanna spend a bunch of money, northern lights makes some sick boxes. Fully automated everything. Can get very expensive though.
https://www.bcnorthernlights.com/products/the-bloombox/
Or you could use a tent from Amazon, there some decent ones on there, just read the reviews.
Last option is finding a closet in your house you don't wanna use anymore, but some reflective mylar on Amazon (it's like 40$ CAD/roll) and line your closet with it. I did a similar thing to my front entrance of my house that I never use. That's probably the cheapest but most labor intensive option. I'd personally recommend the grow tent. I just ordered one myself this ones probably more space than you want to use, but they make smaller ones as well.
VIVOSUN 2-in-1 36"x24"x53" Mylar Reflective Grow Tent for Indoor Hydroponic Growing System https://www.amazon.ca/dp/B07HQHG311/ref=cm_sw_r_cp_apa_i_w-CvDb8E983JP
The greenhouse dings i wanted to get has 2 sides so I was gonna do one side for fruiting, and one for colonizing. This one, saving my cash for ithttps://www.amazon.com/dp/B07HQHG311/ref=cm_sw_r_cp_apa_i_B0fiFbA5R8VG4
Like this: VIVOSUN 2-in-1 36”x24”x53” Mylar Reflective Grow Tent for Indoor Hydroponic Growing System https://www.amazon.com/dp/B07HQHG311/ref=cm_sw_r_cp_api_i_q.V2Cb0186Q40