Thinking of adding a mini chop to addition

I recently bought a home that particularly had an addition put on as an afterthought, then the addition is where the laundry & most of the storage goes into.

The space is substantial enough that it would be easy to serve as a beach house gym.

However, when the addition was added, HVAC was either forgotten or intentionally left off to save money, and not having heating & cooling in that area is always a pain, and in the summer time the moisture creates mold & wrecks anything I leave on the shelves. In the Winter time I dread doing laundry because I am so cold. I suppose I am going to add HVAC in the space in Springtime. I have already talked to a HVAC worker about it. The HVAC business doesn’t advise attaching to the existing HVAC duct. She worries about hooking the ducts & breaking into our walls & ceiling. She said it is possible that our addiction might not be as sturdy as I think. She doesn’t want the whole area tumbling down because of HVAC duct upgrade. The HVAC worker recommended that the people I was with and I add a ductless mini split. This way I will have heating & cooling in a single unit. It would have its own thermostat that I can control. The HVAC business told myself and others I can do a low heating & cooling system so I can save money but still have comfort. The cost of adding a mini chop is quite adequate. The upgrade doesn’t even look too bad. It is just a hole that needs to be drilled & refrigerant tubes & wires threaded through.
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