Decision over the air conditioning items is stressing me out

I definitely don’t like it when I have an important decision to make, & I am having a hard time deciding. I think that until I make up my mind that I am not going to be able to relax. The issue is that I am deciding on whether I should get a current Heating & Air Conditioning system or not, but you see, my air conditioning device has been having concerns for a while, however I am not quite sure it is at the point where I need current air conditioning installation! However, the local air conditioning supplier has gave me a good deal on high quality air conditionings. Their brand current cooling devices are way more efficient & better Heating & Air Conditioning technology than my new system. That & I think this deal they are having is not going to last, & if I did get a current air conditioning component, it would really last me a long time, really the rest of the time I would be in this home. However, the only issue is price. I am not sure if I am willing to commit that much money just yet. That is a lot of money, & I am already low on money as it is. I don’t know, however I think I need to make a decision soon, because that offer ends soon. The stress is killing me, I might ask my partner later & see if he has any input on what to do, more than likely, he is not going to care either way.