I really like our electric mower. This is the one we have, I'm sure there is probably an updated model:
https://www.amazon.com/gp/product/B004JMZH3A/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
I purchased a second battery (that I've never had to use) at the time. We have 1.5 acre lot but between the house and trees 70% of that is taken up. The description indicated the mower could do 1/3 an acre (14,520 square feet compared to I think you said 2,900 estimate for your place (30x30ft and back yard 40x50). Based on my experience, it'd be more than fine for your coverage area.
About half of what I mow is flat, the rest is on slopes ranging from gentle to one that pushes a 30% grade. On this hill the self-propelled helps, but it requires a bit more effort to push it. Not much mind you, but more than the mower pulls me if I have it on the rabbit setting and I am on flat ground.
Cons:
- extra long grass can present an issue so you have to go slower. Fix: during peak grow times, mow once a week.
- Trickle charge it over the winter to keep the battery fresh? Although I'm still on the original battery from back in 2011
- Although much quieter than a gas mower, it isn't exactly a stealth machine. If a neighbor stops by to chat you will have to turn it off to have a conversation.
Seriously, those are the only cons I can think of. Pros include of course no gas, no oil, immediate start (after those neighbor conversations
and although it isn't whisper quiet, it sure is quieter than any other mower I've ever heard by far.
BTW, on those reel mowers...I considered one of those. If you have a lot of trees people say they don't work well because of the twigs and stuff trees always drop. So glad I went with the electric mower.