I can only dream of such equipment
My favourite tool acquisition is a multipurpose mobile device that has so many useful applications in specialist model making applications, and was entirely within my limited budget. Please consider the ubiquitous electrical screwdriver.
Not only useful for making or adjusting wiring connections, compact enough for both the workshop and travel to the lake, but is invaluable for opening Humbrol paint tins and scraping filler putty corners in awkward recesses. Also great for scoring litho plate to simulate armour plating, poking sealant into awkward corners, uncoupling servo arm ball joints, and holding small parts down whilst the superglue sets.
With magnetised blade it is perfect for recovering small steel screws that always disappear into hull recesses and for pressure-scoring 3mm deck plank joints. It can be used as a mandrel for forming corners on small copper pipe, and to poke into mini Plastruct assemblies to hold for painting.
Oh yes, and undoing screws.