A TT can be a 14 footer or a 40 footer which dictates the size of the tractor.
Are you planning on using the bucket or the 3 point to move the tractor ??
look at the later model tractors with the flat deck work station with the 3 point stick and the FEL stick next to your elbow. They also have a hood that opens up the entire front of the tractor for easy access. Older tractors the operator has to sit straddle of the tranny and 3 point stick is down by the feet.
The newer tractors also have the FEL attach points on the rear and middle of the tractor vs front and mid tractor points on older models which puts more weight on the smaller front axle/steering.
IMO take your pick of a orange/red or the green one. Right now they have some very low interest rates and good deals on new models.