I know you are in NY...but there is a place in Al. that can convert your bike to a trike in just one day, and for about $13,000 using the latest RoadSmith kit...ride in on two wheels and out on 3 wheels..if interested call Kevin @ KD Cycles...and NO I don't work for him...I am just a customer my name is Tommy Brown...
If you haven’t started doing research already - one of the biggest questions you need to answer is what manufacturer are you looking at. Each company has pros and cons - much like a Ford vs Chevy vs Nissan!
The “big” conversions are typically (in no specific order) Roadsmith, California Sidecar and Hannigan. I think each of the companies website list their installers / vendors. I know from my past search (in 2018) there aren’t many in NY.
A great online resource for trikes is triketalk.com