Need to upgrade Jandy Pool with Aqualink RS Control

Current System:

Pool size = 17,000 gallons, SPA, Pool Solar Heater, Gas Heater.

Single-speed 2HP Jandy pump - defective

AquaLink RS Control Panel (RS4 indoor & outdoor).

Jandy Aquapure 1400 Salt Chlorinator (not working properly).

Jandy CL460 Cartridge Filters (4 x cartridges to be replaced).

What is the best least expensive way to get the pool running? Thank you.