Pond Boss Forums INTRO Questions & Observations Starting a pond management business

So I got my first official project and it's a doozy. It's an 8 acre pond average depth of 5' max 10'. It is absolutely infested with watermilfoil, watermeal, duckweed with a little sago mixed in. I intend to use 2 gallons of Sonar AS but I am in a little bit of a quandary. I don't want to be blinded by my eagerness to get this business off the ground by misadvising my customer on the timing of the initial treatment.

Would my customer be better served if I were to tell him to wait until Spring for initial treatment? He wants this stuff gone and is ready to spend the money that it takes for the initial kill and ongoing maintenance for years to come. He's hoping that next years maintenance will be will be much more affordable after weeds are under control.

Any advice is very appreciated.