Hello everyone, I've just about finished designing a Tab & Slot style frame that will bolt together for my mill. I haven't ordered any of the parts yet and wanted some feedback before I commit to the build.
Specs for the parts I've included in it:
Avid CNC electronics bay and 4hp MTC spindle
Nema 34 motors except for on the 4th axis
counterweight for the z axis (not modeled yet)
HGR rails and HGW bearings (probably gonna source from aliexpress?)
MACH4 for the firmware
should weigh around 500 lbs assembled, maybe 1000 lb if I fill voids with epoxy resin and gravel, like the actionbox guys.
before shipping and taxes the build should be less than $5000.

My questions:
Do you think this could cut steel reliably and accurately using a 4hp Hiteco spindle and the frame just bolted rather than welded?
Is sourcing the linear rails and ball lead screws from someone more reputable like misumi really worth the extra money?
Are Nema 34 overkill or just right for a machine this size?
Can I spend $5000 elsewhere and wind up with a 4 axis mill capable of cutting steel and can be moved into a basement down a hill with no hoists? (most difficult requirement honestly)

Thank you in advance for any feeback!