Selling in 2 years: short term fix for 25% less vs long term fix

[Jack B.]

The drain pipe from the kitchen is leaking into the basement. The galvanized pipe is rusting and causing a leak. The rest of the house is on PEX already. But they didn't do the drain pipe to the basement when I bought it.

I can have them terminate the new pipe below the ceiling into the basement for 1.5 K or have them replace the whole thing UP TO the concrete floor for 2K.

I plan on selling the house in no more than 2 years anyways. I'm tempted to go with the 25% cheaper option.

Part of me wants to do the short term fix, as it sounds like they don't go below the concrete and there is always still a potential for a leak, as the  plumber said they terminate for the long term fix 3" above the concrete slab. I plan on selling the house in 1-2 years anyways.

The other part of me thinks, long term fix as it will be less likely to come up in inspection. That said the house has a 10 year old water heater and needs to be replaced as well, but I want to sell soon to avoid all the capex expenses. 

So 1.5K for a fix that will likely work for years then sell, or 2K for long term fix?