Coilovers are easy to fit yourself. A few people have made DIY adjustable panhard rods too so maybe you could get one of those cheaper if you put up a request
If you want a durable wax, you're probably better off with a paste wax over a spray wax. I use Finish Kare 1000p and it comes up really well and offers months of protection. If you QD in between waxes it will last even longer First link I found, you might get it cheaper elsewhere http://www.cleanyourcar.co.uk/sealants/finishkare-1000p-hi-temp-sealant/prod_589.html