How much would it cost to fix air conditioner and require a honda accord lx 1994?

How much would it cost to fix air conditioner and require a honda accord lx 1994? Window power don't work and need fixing. Want to rewire main circuitry. How much money to invest in such a car? I already invested $5000 and paid $2700 for it. How long would it take to fix air conditioner (not working) and rewire wires connected to doors, stereo, and steering wheel? Want is value if invested so much money?