I had an
L275 Kubota for 20 years with no cab. It was outside most of the time and the cockpit suffered from sun and rain. And inclement weather makes one want a cab badly.
Next, an International 235 with canopy for 5 years. The canopy with a windshield was a step up to protect the console and protection from the rain when back in the woods a mile.
Then a Kioti 45 HP with aftermarket cab for 4 years. Bad idea. The aftermarket cab blocked bucket visibility so badly that landscaping was a challenge. It had a heater installed but was not necessary. The windows fogged up when plowing snow unless the man door was removed.
Now for the past 4 years my ultimate tractor, RX7320. Bought it without cab because the factory cab required a 9' garage door opening. I built a cab from scratch that enters my 8" high door for $1000. Inside, the cab has two shelves over the fenders and a shelf over the steering column with lots of storage room. There is loads of information on the web to help design your cab. My cab windows are plate glass (robbed from house windows with broken seals) covered with
safety mylar to contain the glass in case of breakage and it works perfectly. My back window is not glass but a 2 pound wood frame covered with the safety mylar "backing" that is perfectly clear and tough and pops in and out, released by 2 magnets. It gets cool in Canada (-30F) but this winter the back window stayed in the tractor garage. You dress warm for being outside anyway. The tractor man door stays in the garage also, winter and summer. For yarding logs (in and out constantly) the door is in the way and the fresh air keeps the windows from fogging. But if you're not going to store the tractor inside a shed then leaving the window and door off is not an option. Buy the factory cab (usually $10K more).
My friend had a DK35 with factory cab and it would fog up completely with all defroster fans running. You had to open the windows and doors to see. Our hot days here are less than 95F and it works fine with the side and back window removed, though I work in the woods mostly on hot days. Not sure if the open field on a hot day would be too hot for working all day? The woods are always cooler.
The John Deere owner who commented herein, "Wolc123" has a great option. Hack a canopy adapted to the ROPS (a couple of hours) and you can always build a proper canopy or cab later if required. I attach a prototype wood cab photo that helped perfect my cab design. It was held in place with wood clamps and duct tape. Bottom line, a home built cab with low height is handy in many places and the dry storage area for chains, tools, etc is wonderful. It's the difference between camping in a tent or a trailer. In a trailer your equipment is on board and ready anytime.
The good news is, Number15, you're on the right track. Every man needs a tractor (or two). : )