The thing about trikes you need to know is that you can easily spend $300-$500 going through a trike after you buy it on a non running one.
On a running and driving one you can still a couple of hundred tweaking it the way you want. And you can very easily spend over $1000 with upgraded parts,tires,paint...etc. Then after spending $1000+ you will never be able to sell it for even close to what you have invested. So it is going to be a labor of love. Know that going in. That being said,spend whatever you can on the right one. They are a blast and will last you the rest of your life. They have lasted 45 years so far.And there is nothing that can't be repaired or replaced. The Snowco Nomad to me would be the right one. It is very similar in size to the T555's that I ride. And rare enough to be very cool.... If that were close to me. I would buy it. But I am not saying it is worth what they are asking. I would just over pay. Because I know I would use it and get my money back in fun....