I have quite a few years of experience and still do it PT. I can tell u you need to do a lot more research before u can be considered competetive. Its really not easy work, not by any means the worst, but when ur percariously perched 40 ft above a 100,000 dollar stingray trying to stretch across to get that smudge in the corner and u got a spider in ur face and a bird randomly diving u cause ur too close to its nest u may find urself seriously evaluating ur current professional endevour. Not trying to discourage you but ur competitors are using 200gal resevoirs of treated water in a van with 1000's of feet of hose for the pressure guns, extension poles 5-30 ft to reach awkward jobs a little safer, t-bars and a lot of mops, extension poles for them as well 5-30 ft, 40ft 4star ladder minimum, you'll likely need at least one person to help, especially if ur gonna do interior and exterior, what about building wash's, ur competitors will be doing em for sure. If u expect to do any of these in a timely enough manner to make a profit whithout comprimising quality you'll definetly need a helper, can u afford to pay and hourly wage, licenses, insurance, on business and vehicle, until you establish a strong clientel and a dependable residual income? not to mention something that can get u and all this from A-B. Water weighs 8.5lbs/gal, 200 gallon resevoir, gas in the van plus the pressure washer and gas can in the pressure wash, you, all the equipment. Its gotta be able to pull a little weight dependably. What if you or worse ur help takes a 2 story header? Or even just doesn't inspect a window before hitting with the pressure washer and breaks it, can u afford these setbacks as well? It may seem far fetched but I saw most of this shit in my first 3 months lol. Again I don't wanna discourage you, but its harder work than it seems, especially alone, and its gonna cost more than you think if you want to do it properly, sure u could handwash all day but ull be toppin 2 jobs a day, at about 100 dollar avg. Per house ( at least here, inside and out, tracks screens and a 3 star. Hydrophobic coating) that's 200 a day, which by no means is bad, but u may only get 1-3 jobs a month for a while, unless u have a huge ad budget and a lot of well off friends. Whereas where I'm at now he made a huge investment in new equipment we can now do 10-15 jobs a day at the same avg. Price and the treated water+ pressure washer made the results 10X better thans traditional handwashing. So word of mouth took off. Given this company has been around for 30 years so they've had the time to establish a solid clientel and many things they do to keep and encourage customers. I honestly can't tell u as I signed a waiver at hire :/ lol. But if all that is an actual possibility for u, I say go for it and u should do well. I just thought this was neccesarry cause no one is really gonna take you seriously if they say "hey I'd like to get a quote on my windows" u get there and go "oh, sorry I wouldn't feel comfortable working above ground level.hope I didn't sound like a dick there