Welcome, Tandy.
First, you want to figure out what trailer and model you want before getting the tow vehicle, or invariably the TV ends up insufficient for the loaded trailer.
Second, electric only is very limiting. With a
solar panel of 150 watts and
propane, you can run a
furnace and cook on the stove and use anything except the A/C. Even a
microwave can be used with an inverter.
Campgrounds in the busy season may fill their electric spots but there may be spots with no electric available. You can take one with no problem if it is cold and rainy, if you have
propane.
There are people who have bought an all-electric camper only to then decide that they need to install a
propane furnace. So you might want to consider where and how you expect to camp. You will have no trouble towing since you have done that with a horse trailer.