Sadly two guarantees here, the esc and batts will not handle what you want. That motor is an amp hog in delta configuration, and would be 6s max! If you use the wye configuration you will be in a better place for the esc. I don't know that the esc will give you any joy though, you would be better off with the ZTW 300. You need batteries that are 5000 mah and 40c min, and I would suggest paralleling two 10s sets together for 10000mah for reasonable runtime. Gear reductions are a waste of time with brushless setups.
I have to ask what you are looking to achieve? 7000rpm in a model boat is not going to be efficient no matter how big a prop you use. I have a 45" hull that with a 56mm can motor 650 kv on 10s would run a X460 prop for speeds around 50 mph, that is 24,000 rpm unloaded, approx 20k rpm loaded.
NZMPBA 2013, 2016 Open Electric Champion. NZMPBA 2016 P Offshore Champion.
2016 SUHA Q Sport Hydro Hi Points Champion.
BOPMPBC Open Mono, Open Electric Champion.
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