Hi there – I gave up conventional bikes 20 years ago. You can get a recumbent trike with really good granny gears. If you don't have to contend with hills you will be fine. The two wheels will be on the front and you will be in a comfortable semi-reclining position. Look at Bentrider.com.
If you have hills or are weaker you might try putting on a RideKick trailer. I don't like electric bikes because they are heavy, they break down, bike guys hate to repair them etc. But with a trailer if you break down you pull the trailer off and chain it to a tree and ride home. Get the LiFePo battery, maybe two of them if you need to travel long distances.
That is my solution after 20 years of research, much wasted money…. You should expect to spend about what you would for a decent older used car.