HVAC equipment in our garage

My partner thoroughly enjoys going fishing. I swear he could do it all day and all night if he didn’t have so many responsibilities, he consistently comes out to the house and stinks so bad of fish and then starts to cut up the fish he just caught on my new countertops. The fish stink will linger for days after this and I believe he is using the sponge to wash the counters after and that is not sanitary at all. My young children even comment on how terrible it stinks. So I have decided that for his birthday I am going to arrange to have a fish cleaning station set up in our garage, this way he can cut and wash all of the fish he wants and he won’t have to hear us complaining about the stink on a regular basis. I know I am also going to have a Heating and A/C component installed in the garage while I am setting up his fish cleaning station. I don’t want him to overheat while he is in there because it normally takes him a while to wash all of those fish. I called my local Heating and A/C supplier to have a technician come out and look at the garage. When the Heating and A/C supplier looked at everything he said it would be a fairly simple task to get the Heating and A/C hooked up in the garage. I guess the family that was there before had HVAC ducts installed that was already leading to the garage. I guess they never finished the project, but that definitely works to my advantage. Since they already had the overpriced part taken care of this was going to cost me much less than I anticipated!