You can do this job in stages and preserve your budget.

You can buy OEM replacement front control arms with new bushings and ball joints. Sway bar bushings are cheap.
You can rent a spring compressor.
This will make the biggest difference in the ride.

Rear bushings are also relatively cheap. You can rent the tool that changes them out.

Front struts and strut mount change out is a relatively easy DIY job so is rear stru change out.

Only do your brake rotors and pads when required.