Thanks, I still have to drill holes and weld couplers on kegs to see how it works.
Walls in basement are painted, I laid pipes for water supply and drainage and also finished with installing kitchen elements (it is our old kitchen, luckily we kept it).
I already had hole for ventilation in one corner, so I am going to use it for ventilation. I have 65w inline fan and kitchen hood.
One thing I added is valve on wall with quick disconnect, for water supply.