When is HVAC AC worth it?

We live in a 2 bed/1Bath 700 sq walk up prewar CoOp. Our apartment was gut renovated when we purchased it almost 10 years ago. We are in the process of planning a renovation of our kitchen and bathroom (keeping footprint) and we would like to consider adding HVAC for cooling . The estimate to install a condenser and two units (1 wall mounted split stack and 1 ceiling cassette) is 14K but we would mentally round up to 20K all in (additions, finishing, painting, sheetrock repair)  When is adding non-window unit A/Cs worth it? This would become a fairly sizable project for us so we would like to consider all factors. We have no plans to move in the next 5+/- years.