The 52 loader does not have a built in automatic parking stand, and requires manually attaching the loader to the support beam. So there is some on and off the tractor activity, but still probably not too bad. Just make sure you get the parking stand pieces with the loader.
The later model 70 loader, other than disconnecting the hoses just requires pulling two latches while on the driver seat, and backing away from the loader.
The belly mower is pretty standard attachment. Pull some latches and disconnect the driveshaft. One helpful hint here is to put the PTO selector lever to REAR ONLY position when connecting the mower drive shaft. This will make the mid-PTO shaft on the tractor free wheel and much easier to align the splines from the mower shaft. BTW, the left front deck wheel is removed when rolling the deck under the tractor for attachment.
And welcome to TBN. Enjoy that 755!