Spraying is lucrative, especially here in CO.... in my opinion immoral. I know of some companies pulling a grand a day per spray truck.
I have a mostly organic phc program, when organic ipm techniques aren't possible I will use a contained system like root injections......... if we can't save the trees with that we remove and replace..... also profitable. Though you don't get nearly as many customers that way.... most are happy to spray chemicals where their kids play, I don't get it. Our program is more expensive and I tell customers that right off the bat, I will even tell them exactly what other companies would charge to spray it and I tell them that the spraying will most likely work and save their trees. Most customers around here are open to my ideas if they have the money for it.
In my opinion PHC is real tough to get into unless you have a huge customer base and solid advertising. You can make a grand a day but you might be doing twenty jobs a day to get that. Especially in our market.... competing with swingle and davey with spraying is next to impossible.
IPM is more of a niche thing right now and people are buying it, I prefer to sell fewer big jobs than 100 tiny spray jobs. Get a bigger chipper, bucket truck, skid steer, or something else instead of a spray rig.
Just my opinion.