A forge? thats fucking sweet.
Got a pretty decent workshop out back here too, miter saw, jigsaw, power drill/screwdriver, dremel tool, big bench press drill, and an old (probably pre-WWII but perfectly functional and accurate to within a fraction of a millimeter if set to be so) capstan type turret lathe (where instead of having to set up each tool in a single post and keep changing over, multiple tools can be installed, set and then just switched to by cocking back a lever.
Wouldn't mind a forge, but I think the next time I embark on a really major project, it'll be a fourier-transform ion cyclotron resonance mass spectrometer. Basic concept is to ionize a sample and then accelerate the ion packets into a vacuum chamber through a small linear accelerator and then use RF and magnetic fields to synch the controlling RF field that accelerates the ions to the cyclotron resonance frequency of the ion type(s) and thence accelerate them to a higher orbit with a higher cyclotron resonance frequency making them spiral further outward towards the walls of the vacuum chamber, with a magnetic penning trap field, as part of the cyclotron and have them pass by a pair of electrodes, the ions, being charged, induce a temporary charge, and the readout on an oscilloscope (I think at least this is how the data needs to be captured) is then subjected to a fourier transform, on a computer, which gives the mass spectrum of the ion types.
Its tech that just might be within reach of the amateur tech-hacker type, and the only way, short of perhaps the use of an orbitrap that I'd be able to have myself a mass spectrometer, which I REALLY would love to have. But to buy one, even second hand and an old model would cost many thousands, way, way way way more than I could afford if I saved every penny I get for decades most likely. But to build one...I think it just about possible.
Now my mom's kicked the bucket, her room would be perfect since its away from all the sensitive electronics (the penning tram is a magnetic ion trap and uses very strong magnetic fields for confinement of the ions) and the LINAC part of the injector system again, uses powerful electromagnetic fields and quadrupole or sextupole electromagnets to confine and guide the ion beam.