THOUGHTS ON SLEEVING?

I got a quote on a 4 banger, with 1 sleeve installed and all 4 bored +.75 (.030) $300, just the sleeve and it finish bored back to STD, $150. The sleeve is $28 alone. FSM says main caps need to be torqued before boring, logical. Industrial stuff had stepped liners that could be replaced with minimal machine work.