Any advice for hacking the lawn mower with BMSM?

I have an old mower I was looking to replace with electric - I was looking at ego but I am already in the milwaukee eco system and decided to try to find a deal.

I can’t seem to find a great way to hack the mower with BMSM. I have found a few options on FB Marketplace but trying to avoid unauthorized places if I can. Is the 999 standard bundle the best deal out there right now?