Who has successfully cooled 2 rooms on a flip with lung room ac?

Okay like the title says I am in a nothern climate and am able to cool so far with only exhaust fans. But it's getting ready to warm up. I have six de 1k lights ( in each room -2 rooms total.) But have room for more lights and would add some if could cool it.

I had previously decided on another thread to just buy two mini splits one for each room.

But times are tough and it almost seems a waste since our temps are fairly moderate and leans toward cold most of the year.

I had the whole building spray foam insulated and have a 10x12 room that is just for storage and water mixing. That room is the only room that does not have a ceiling and is open to the attic which has also been spray foamed.

I'm wondering if I put the AC unit in that room and ran my rooms on a flip if I could get away with just one unit.

My thoughts are that room and attic area can be cooled to 65 at all times with the one unit and then when my exhaust kicks in intake air can come from that part of the building.

So anyone have experience with some 6-8k rooms and a lung room?

Sorry if this rambles a bit been into my stash.

I dont have the experience running that much light, I have a 12x16 block bldg. split into 2 8x4 rooms Flwr= 2x600 w HID and veg= 2x 450w led and 2x300w . I run a 6in exhaust outside and a 4inch pushing air from the lung room into the flwr room. I have been running a 10k btu ac and has been able to keep my temps at 88 during lights on ( which I run at night). It does the job but I am looking into upgrading when this unit goes. Your description of your grow sounds like mine with the lung room ceiling. I push and pull alot of air thru the grow spaces and the girls are happy. I like having the lung rm to condition the air, but I havent grown any other way

I would probably put a ceiling on the lung room, minimize the area that is used for the lung. Then it's just a matter of having ample CFM to and from the lung room.

Electric dampers could be used and eliminate the need for added blowers. A push pull system would be most efficient.

The idea of the lung room would be to not exhaust your air outside but recirculate to the lung room, run CO2 enrichment in the lung room, cooling and put the dehumidification in there too is you wish but probably better to use separate dehumidifiers in each flowering room.