Bought my T5C in '06, the year I retired, and have never looked back. The FEL isn't much until you compare it to the mere blade on a mini-ex, but it does work. IMO, $5k is a good price, and HFT 'Predator' motor seems like a 'drop fit'. (might have to tool-up a flywheel-side 'adapter' to dub'l Cardans)
Buy a 'real' tractor of 40hp or higher to get comparable digging power/depth as a T5C. It won't weigh <3k on a trailer.
I had only a CUT when I bought my T-M in '06. I've since bought and sold two 50hp JD LUTs, sold the first CUT, and bought three more <40hp. (also used all three & the T-M in the last two weeks) My point is that I don't have to swap out a small-ish backhoe that'll tie up a 3-PH.
OT, and a bigger point is that IMO stumps of trees bigger than 12' or so are
far better 'ground' than dug. (me
no dig if >3" dia at 6" above ground) I removed twin 14" dia firs that big next door,
one each way. Dug the first one, a 12' wide hole 2' deep and hours of seat time ripping/sawing side roots. I 'ground' the second one (also freshly-felled 30" dia elm stump in my yard) with my DR walk behind. (I'm 69, btw) Backfill with shovel and seed 5' wide 6" deep holes in quick time, vs unhooking/parking a BH and bringing yards of backfill, leveling, etc. btw, remove as much chips from backfill mat'l as you cant.
Terramites are made mostly from off-the-shelf components for rental use and for easy maintenance therein. (cyls, hoses, rod ends, Dana 44, etc) I've changed fluids and replaced a battery in 13 years of reliable use. A neighbor just offered to buy mine. Uh, sorry, not ready to part with it. :2cents: