Back to the grout gun, they can be a bit awkward to use at first, but after becoming familliar with it, it can be a useful, productive tool. Do you do a lot of point up jobs? If not, renting one might be another option. When using it, you MUST add the plasticizer additive to the mud. Its a powdery substance and its concentrated. About a teaspoon to a wheelbarrow. It will make the mud gummy. Much more gummy than you'd ever want in your mudpan in fact. But this is because if you don't use it, pumping the mud will loosen it drastically and it will flow out like a wendy's frostee left out in the sun. The hopper on the device is open topped, and gravity fed. So pointing a ceiling is definitely not on the uses list. When we used it to repoint a large walkway on a college, it worked beautifully. Depending on units, one person pumping ahead and 2 or 3 pointers behind him would probably be most efficient for jobs like our large paving stone. Brick, maybe 1 or 2 pointers could keep up. Hope I could help!