Stop in for a cup of coffee

I'll admit, that's about the only way I can afford it.....BUT I draw the line at not having certain things dead on. Like crank clearances, guide clearances and seat and valve faces, for example. I don't compromise "there".
Some machining may be unnecessary for a simple street build. Checking straightness and clearances don't cost much but time. For instance, no need to line bore unless there is an issue. Turn and/or polish the crank as needed. Check the clearances and install it with assembly lube. If the crank spins freely you should be good.