If you're looking for a small or compact tractor, it is important to make sure that you select the right machine - one that will do what you want it do, and do it safely, in comfort and with ease of operability. You should therefore aim to choose a machine with the design and specifications that will suit both the type of work you will be using it for and the environment in which it will be operating, and that you can also maintain without difficulty.
In addition, it is unlikely that you will be using a small tractor to perform one type of job only. Therefore, you might want to think about choosing a machine that can be used in agricultural, transport and field situations, or one that can also be used for PTO jobs or as a loader. Versatility is the name of the game, and so you should be looking at a machine that can take on the most roles with the least effort.
Operator comfort is vital when choosing a tractor. Like the machine, you will no doubt have a lot of long working days, and so it is important to look at how well the tractor's design considers user comfort. For instance, how intuitive are the controls? Are the ones that you will use most frequently conveniently located? You should also look carefully at the seat and the amount of swivel it has, vitally important if you need to look to your rear frequently. You should also consider whether it will be necessary to have an instructor's seat.
It is also more than likely that you will at one time or another be using your tractor in some extreme weather conditions, and so the quality and efficiency of the air conditioning system should play a role in your decision. Ideally, a cab that has numerous, individually adjustable vents creates the most pleasant working environment, whether you are out in the baking heat or working in extreme cold.
If you do decide to opt for a tractor with a cab, make sure that that there is sufficient headroom and good visibility on all sides - including above and to the rear - and that you can see the front of the machine from your driving position, especially important when you are using a front end loader bucket, for example. Likewise, if you are likely to be using the tractor in a situation where you have to get in and out frequently - to operate a fork lift, for instance - then it is important to make sure that the cab door opens widely enough so that you can get up and down quickly and easily, and that there is a flat floor in the cab.
Operating safety is of course paramount. If you will be operating the tractor on steep or uneven ground, then ROPS is essential.