Suggestions
 

I'm nearly 69 and will likely be 70 before realizing the means to do so but, I'm looking for a recumbent trike, suitable/reliable enough for several k miles on a transcontinental tour. Yepper, know about the Green speed types but a new one would be well out of the ballpark. And have found a couple "good local deals" but research has revealed them to be a tad inferior for my purposes.
Long story short...What are the better (not high-end) brands I should consider? Gears/speeds? Ads to steer clear of?
Thanks for your patience.

Catrike expedition looks pretty good, depending on your budget, made in your area as well. I would look at every Craigs list bicycle sale in Florida for possibilities
first. Seems like there would be a large secondary market down there. It would behoove looking at relatively new trikes because of the
revolution in ultralow gearing the past few years. Also depends on how loaded you will be and daily tour mileage. Getting 10mph out of
a trike (on average) will be a bit difficult when one looks at transcontinental touring. That is making assumptions perhaps but not very
many of us at age 70 output more than 2-2.5 watts per kg.

If you read Crazy Guy On A Bike, you will find hundreds of reports of cyclist riding cross country on trikes.

Catrike and Wizwheels are the largest trike makers in the USA.

Edit: scratch the name "Wizwheels." It's Terratrike.
http://www.terratrike.com/index.php

I agree ref the Catrike Expedition.

Check the Trike sales section of 'BentRider Online