As a detailer who works on a budget like you, go with the Optimum line. You won't be sorry. Even their compound breaks down well and doesn't dry and dust up. There are oils that allow you to get almost a full polish just from using the compound and the poli-seal is incredible for a 1-step Polish and protect setup. With it, you can throw a Carnauba wax (very thin) on top and get your own cars and customer cars looking VERY good.
I use Optimum Compound, Polish, Poli-seal and Poorboys EX-P Sealant (when not using Poli-seal). I also use Meg's professional-line stuff. Final Inspection is my detailing mist and wet-sanding lube of choice and I use Meg's Hi-tech Yellow Wax #26 as a finish to add depth to and a little extra protection for either of the sealants I use.
For my budget, and the cost of the product and the outcome I get using them, you can't beat the Optimum/Meg's combo. Granted, I did have to get my gallons of Meg's product from a local paint store who sells professional-level detailing products to local businesses, but I got them all on-sale at a great price. I use Meg's Wheel Brightener for cleaning rims and Blechewhite on Tires as it seems to leave the cleanest surface for applying a quality tire dressing. I use Meg's Endurance Hi-Gloss tire gel as my tire dressing as if you leave it to sit on a tire with a thin coating, the dressing actually soaks into the tire and protects and lasts a couple of weeks while giving a nice new shine to tires without flinging it all over the side of your car once you drive it down the street. Just don't use too much like most non-detail-minded people like to do because they don't realize the after-effects of using too much tire-dressing.