Great post Boohoo...that is the way to make serious money in this business!
Simply put, a jet machine is sufficient if you want to enter the game at around $4000. You can get a pretty decent 300 gallon unit for this. A new Finn T-60 will retail for around $20,000 this season...taxes, title and delivery.
But like someone earlier said, the jet will leave you wanting more once you understand that the name of the $$ game in hydroseeding is "efficiency".
I call it cycle time....the cumulative amount of time it takes to fill...mix...and shoot a load of mulch. Cycle times vary from job to job 'cause the availability of water is going to be different on each job.
Cycle times vary from machine to machine 'cause of their ability to mix. If you are going to buy a jet, get one with plenty of engine and at least a 3 X 3 pump.
If and when you do begin the search process for a jet machine, don't be fooled by phoney baloney manufacturer's claims about how 'theirs' is more productive. Product 'names' that sound powerful and suggest better mixing capabilities are just that...words. I won't mention any here ;-).
We sell one at turfquip, and I'm not trying to turn this into a commercial, that I know for a fact will mix and shoot mat blend 50/50. It's good to be able to offer your customers wood