You see the drop frame bike I'm riding left. I started having trouble getting foot over the high bar about age 62. I'm 71 now.
The 2016 Raleigh Tekoa has a a currie mid drive, Court's review says. I have no knowledge of that system. Bosch mid-drives have a patented battery connector that makes replacement batteries >$1000 and I read Shimano Steps mid-drive has a computer in the battery to make sure you don't replace that one with a generic battery either. Somebody on diy parts was complaining about shimano battery unavailability for 3 or 4 months.
OTOH 48 v 17 ah battery from california-ebike is $620 and littakal via aliexpress is more like $200.
As you are in Indianapolis I don't see goat thorns as being a serious threat. I ride $26 kenda knobby tires in Kentuckiana which roll right over broken glass metal shards & tire segments with wire poking out. Until the knobs get down to 3/32" which is where I change them. 90% of my tires reach life without ever going flat. See various flat tire threads for more expensive solutions.
Most brands now have a step through bike.
https://www.magnumbikes.com/product/magnum-cosmo-plus/ Ones I've looked with short lists of known problems on the brand forums include blix kona trek giant gazelle.
https://electricbikereview.com/?s=blix+aveny You do have to unplug the hub motor on bikes that have those to change the tire. Or you can do as I have, install extra wire to the hub motor and loop it up in ty-wraps so all I have to do is cut the ty-wraps, slip the wheel out of the fork and set against the bike standing on its seat & handlebars. Be sure not to buy a bike with a display that projects above the handlebars to do that.
Note the treks mid drives giants konas & gazelles have bosch or shimano batteries, whieh gets you back in the $1000+ battery department. Giant has yamaha, I've seen no battery price on that mid drive. There is no reason in Indiana to have a mid-drive IMHO. I ride a front hub drive across ~80 hills on my 30 mile commute to summer camp. Clark county is hilly away from the river.
Per comment above about 45 lb bikes, I don't see the point. Maybe if you take your bike for rides in your car. Personally I parked my car until gas gets back down to $1 a gallon. With racks, bags, 2 leg stand, battery motor tools 3 tubes 40 oz water rain gear my bike weighs 94 lb. I can pedal it up a 15% grade unpowered if I want. I do find excessive rear weight annoying and have my battery & motor mounted on the front to balance the bike when I'm pushing it out of the garage.
Happy shopping & later riding.