Replacing a water heater in a rental house
I have a 3 bedroom, 2-1/2 bath house that I rent out and the water heater has started to leak. I'm not quite sure what to replace it with. Its 2531 square feet, 2-story. Right now there are 2-3 adults living there and 3 little kids. I'll probably be selling the place in the next 1-2 years. There is a 50-gallon electric Rheem there right now. I think a 50-gallon is larger than I need. I understand the FHR is the most important number to look at, rather than size but since I don't live there, that's difficult. Is there a rule of thumb? And I understand the EF rating is next important but I can't seem to find that rating on tanks I'm looking at on line.
Price is an issue and there are so many different prices. Its very confusing. Any brands to stay away from or ones to particularly consider? Its in the garage so the size won't really be an issue. Any advantage to a short one, tall one....other than a space requirement?
Advice would be appreciated. (Tenant plans to install it.)