Well that is kind of subjective. It also depends on your power company. You mentioned running pumps at certain times to lower cost. If you have varying rates that can make it a bit more difficult.
I believe my V2 version had a parameter you could enter that would set a rate per KWh and you could read back cost. I never used it and maybe the newer versions have this as well. Again it's a fixed rate and if you have to change rates based on time or date, then it is not so easy.
Like I mentioned for me in a earlier post my power company uses a constant fixed rate per KWh. So it's a simple calculation.
Also my power company reads my meter at the same time every month. I know some have varying billing cycles, again another variable to track. I guess in your case you are only tracking the usage of one particular device not your whole home, so that really shouldn't be a concern.
In my case I just read my energy level every night and every hour. From that I can calculate daily and hourly cost. Then I send a reset each month on the same date, another easy RM task. I think there is an app someone ported over from ST you can use to reset you HEM at preset times. So that would be one less thing.
I am sure the community will help you if you need any assistance once you get it hooked up and reading