I believe these are on the lower end of the price scale, and is understandable why you would consider them. To be honest with you, I have not heard of TYM Tractors and not good things about LS Tractors.
My biggest concern would be parts availability. Tractors live forever and are a great return on investment. I am not even sure there is a way to calculate it as at the end of their depreciation span they are worth more used then they were new due to the inflation rate. I had the same concerns about parts when I bough my Kubota in 1999, BUT Kubota has risen in popularity and so I deduced (correctly) that parts would be available years from 1999 when I bought it. It has, and 16 years later I bought some parts after trouble free hard labor.
Myself...and don't you hate it when you give a list of two things to comment about and the replies are based on anything but...I would look into Kubota or maybe even Kioti. I don't own the latter, but I have heard they are bullet proof. Both have excellent parts availability.
Another option is the Massey Ferguson. They make a small sub-compact tractor that is around $17,000 and is absolutely stout. If I was to buy a tractor today, it would be the Massey Ferguson sub-compact...hands down.
The last I knew however, Kubota had 0 percent down and great other financing options
should you require that.
Maybe others on here can give testimonials on how tough and great the tractors you list are, but I have been in farming all my life. I knew Belerus Tractors were often bragged about until a neighbor snapped his rear end casting and found out they do not make new castings for it as parts. His 7 month old tractor, costing a "mere $7000", was one of his most expensive tractors ever.