There are several recumbent bike/trike manufacturers. I've also seen a few tadpole trikes that fold to conserve space (pack into the trunk of a car). I have yet to see a delta trike that folds, although I keep looking.
Sun (
Sun Bicycles - Products) bicycles was a low end manufacturer, but recently bought a west coast company, Easy Racers, and now peddles (no pun) a higher quality recumbent line, two-wheel, tadpole, and delta.
Other brands for tadpoles are Greenspeed, Cat Trike, Terra Trike. Sun sells a few deltas along with Greenspeed and Hase. Hase is a German company that produces the "Mercedes" of delta trikes.
All recumbents are very comfortable to ride, without the wrist numbing and neck pain of an upright bike.
On the down side: hill climbing is more challenging for the casual rider. There's no standing on the pedals. They are all heavier than a high-end upright bike. Transporting (with the exception of some folding tadpoles) can be a problem. Getting into and out of the lounge chair on a tadpole may be more difficult for older riders. The seat is very low to the ground (a delta is easier). Visibility makes riding on roads a bit dicey, especially on a tadpole. I have a two-wheel recumbent and never ride without a colorful flag flapping high above the seat.
But with all of that, I love to ride the bike trails with my recumbent. Florida has many paved, off-road bike trails and on any one of them, you'll find about 1/4 of the riders on a recumbent. We're in Florida right now and I managed to pack my short wheel base, two wheel recumbent and Jane's delta trike, along with a bunch of other junk into our Sienna minivan for our winter
escape.
Emily, we'll be a Sebring for the
Scamp Camp, if you'd like to try either of our recumbents. If you're looking for a used one, check Craigs List. There's always used ones around Florida.
Ron