Any suggestion on multi-meter?

You could use an external current shunt when you're measuring the voltage for the current calculation, but it's a bit of a hassle juggling the extra connections doing that.

You could measure it across the actual load resistance, but that may be hard to do if you deal with loads that aren't pure resistances, and not linear.  LEDs and incan lamps would give a resistance measurement that doesn't give a good indication of the actual resistance when powered up, so for those kinds of cases, a built in current mode would come in handy.

Yes, very true- as far as accuracy, probably 25% would be fine, and any DMM could do that with its eyes closed and meter leads tied behind its case-     That's why I want to put the probe circuit together when I round up the parts; I think it'd be really useful for quick searches of signals.