ZMR 250 Full Build

Hi Guys,

Please help: I currently have a couple of Hubsan X4’s - great kit for a newb but looking to go to the next level.
I am looking at the ZMR 250 Kit and was wondering what else I need:
Which Battery - 1300mah 3S 45C Tattu Battery? How many would you recommend?
Is a Charger included?
Radio Control? Both recommended options appear to be out of stock on the site.

I am also looking to upgrade to FPV at a later date so future proofing the kit I purchase would be great. I tend to get addicted to kit like this and want to upgrade to make it quicker and quicker and potentially buy a better model at a later date.

I am keen to purchase, build and get it flying asap and appreciate your advice please.