Don't forget if you use a more expensive brand, you will probably get better results and can charge more. If you can charge more you can also make more money!
Remember, some clients dominate buying motive is price and will only go where is cheapest. These aren't the best or most loyal customers. Whereas some clients make their decision on quality and customer service and are prepared to pay for that!
Before you commit to any brand, get samples, check out competitors in the area to see what they use and try everything. You need to believe in your brand and product to be able to sell it or your service.
Mat