which TT is best for full living?

Yup, gotta start somewhere and you can try to just illicit responses for what type of camper to buy, but even that is not really possible to give advice on with only 2 basic pieces of information provided.

Roughneck trailers (Canada) are full time capable. Large tanks, many btu’s of heating capacity, large dual pane windows, ducted air and heat, will function at -40 with stereo furnaces, etc

Except... mine weighs 9000 lbs with full fresh water, 2x40lbs propane, some beer and provisions and general stuff on board. 1400 lbs hitch weight. Oh and they have a political incorrect name and graphics on them. Rotten eggs clean off the sides easily.

thank you all for your knowledge!! Didn’t realize there was so much to consider but you gotta start somewhere right?

How far of a tripe in miles will you drive 2-4 times per year?

If you just plan to park it then ANY trailer will work. Just find the one you like.
4-season, yes. Big big issue for cold winters.

I would want one with a lot of space, or one where you can remove things and have space. Storage is going to be a big deal over 2 years. I would want the table and chairs and not the dinnete (which is bulky and permanently mounted).

If you are just doing 2-4 short trips then durability is not going to be necessary, and any trailer sold will hold up.

I normally don't encourage slide-outs, but for full time and leaving it parked stationary most of the time a slide-out will greatly increase your living space. Slideouts have issues of durability, but stem from being slid in and out, not from sitting.

I would not live in a Scamp or Casita if you paid me. Too small.
Look for a quality trailer around 23 feet. Consider a murphy bed, and one big slide out. Look for storage. Arrange the space in the back of your truck under a canopy. Use labeled storage containers. Pay attention to the size of the water, grey and black water tanks. I really like Outdoors RVs. "Right up there with Nash and Arctic Fox.

Scamp, Casita, Escape, and other fiberglass egg type trailers are pretty good quality and lightweight. Escape (which is Canadian) also has insulation packages for 4 season use. They're not cheap, but do hold their value, and you'd have to be comfortable with the size.

For full timing, 6K is really not a lot of weight, so you're going to have to make some pretty serious compromises.

Where will the TT be kept? Any chance a cabin would work for you. It would be more easily made 4 seasons.
There is probably no TT made for 4 seasons despite what the manufacturers might advertise.

Learn the basics of RVing first by reading. Rent an appropriate size TT for a week. Then you’ll know what floor plan works for you. jdc and bid time gave excellent advice.

I suggest you start by learning about what the capabilities of your tow vehicle are, and how much it can really tow.
Chances are you are looking at a trailer that weighs about 4500 lbs (brochure weight) (maybe 4800 if your lucky) because you are going to put 1200 lbs or more of stuff in it. What you really need to pay attention to is the tongue weight of the trailer (after it is loaded, not the brochure tongue weight), and what the payload capacity of your truck is.
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You live in New York. You need a four season trailer if you plan to use it during the winter. Nash, Artic Wolf, Bighorn and Loredo. Your biggest problem? Weight. No 4 season trailer will be light, unless it is small.