The upfront cost for pressure washing is relatively low. All you need is a pressure washer, surface cleaner, chemicals, hose’s and nozzles. Most pressure washers are small enough to put in the back of a car if needed. I do recommend not getting the cheapest one out there to start. I’ve used the cheap ones and its nothing but a garden hose with a good tip. Don’t buy the most expensive either, go for a mid-grade like Generac 6923 3,100 PSI, 2.4 GPM, Gas Powered Pressure Washer.