When looking for a 444 Sunset work tractor, then you should try for one that was made in 1973, 1974, 1975 or 1976.
First of all, they all have the Snap Fast attachment system and that gives you access to every H, J, K, L, M and N Series 44 and 48 inch mower deck as well as the rear discharge 44". You can also use the H thru S Series snowcasters along with the H, J, K , L and UB-54 utility blades. In other words, you have a glut of compatible attachments available.
The Kohler K's used in these years are mounted on rubber isolators and that allowed the discontinuance of the balance gears inside the engine which are known to break apart, drop into the pan, collide with the rod and destroy the engine. Prior to 73, the Kohlers were hard-mounted to the frame, as in your 195.
The 73 to early 76 models all have the reservoir up front and the muffler outside. This gives you a bigger reservoir and it isn't in your way when you need to get at the dashboard.
Try to find one that is already fitted out with the optional rear PTO and at least a sleeve hitch. A three-point would be nice but for tilling only, it isn't essential. If you want to plough the garden, then the 3 point is very desirable. It is cheaper to get one with those option already there compared to a stripped model and then seeking the options afterward. As always, the condition of the engine is of prime importance but with a Kohler, it should not be a deal breaker if you can buy the tractor cheap enough. I would sooner score a 444 with a 3 point, rear PTO and Flow Control valve with a weak, badly smoking engine for $400.00 to $500.00 than pay $700.00 for a stripped 444 with a smoke-free engine.
REASONING..... the options alone are worth more than the price paid. The tractor is then FREE. If I have to spend $400.00 to rebuild the Kohler, I don't care. At the end of the day, I KNOW FOR SURE, what went into that engine to rebuild it and it's going to outlast me as long as I take care of it.
Your 195 could then be restored at your leisure and turned into a show/parade tractor. Sell off the deck and any other attachments for some capital cost recovery.