-
Something like this? https://www.hss.com/hire/p/diamond-core-drill-dd150
-
Why not hire one, along with a rig / stand?
No ones specifically said it, but even if you could do the drilling part with a combi you really want a nice neat straight hole.
Even with a chunky SDS there is a lot of skill to freehand drilling a straight core, so you may struggle. Much better to rent something dedicated.
Why not hire one, along with a rig / stand?