Provide air conditioning or not

[Bryan Williamson]

We have a double the we just finished renovations on and were planning on providing central ac for the tenants. My hvac guy thought the cost would be around 3,500 for both sides. But now the cost is closer to 6k. We told one tenant we would put them in but after getting the new estimate we feel it's over and above what we can afford. After explaining this the tenant wants to move out. What would you do ?