drum sander? you need to look at that drum sander as a flat surface sander but its not a finish sander you will still need to sand by hand with a RO or sanding blocks, they work well for figured woods that your planer wont plane smooth without tear out.
mortiser? like dan mentioned you need to look at how many mortises you plan to make, sometimes just a drill and chisel plus your table saw will suffice..
to many of us, me included bought this tool or that tool because we thought we needed it then to find out it just collects dust most of the time
If in Doubt, Build it Stout!
One hand washes the other!
Don't put off today till tomorrow!