Are T-slot tables necessary and is it worth paying more for steel?

Steel T-slot plate 7030 , ,77 € steel t slot plate I'm guessing you do not have access to a milling machine or you wouldn't have to ask your cheapest way for you to get a clean slot steel t slot plate CAST IRON BASE PLATES A cast ironsteel alloy achieves a Brinell hardness of 180 -200 The tensile strength varies between 260 -300 Nmm²

steel t slot track T-slot distance: 100 mm; made for T-Slot nuts according to DIN508; TolerancePrecision: +- mm 150 mm H= ca 20 mm; H1= mm; H2= 8 mm; D= 50 mm