Yeah, I appreciate that, that's my experience too.
I suppose if you organise yourself well, once you're at say >20 IP's it could still be manageable (as per GoAnna).
There's only so much resi. I can stomach though (not so much a time issue, but an asset issue), before I'm jumping ship...
Because you don't want to focus too much of your assets on resi IP? That's fair enough: personal preference. But for those who do concentrate most of their assets in resi IPs (certainly on gross assets if not net) having many IPs isn't much different from only have a few. 6 IPs does NOT take twice as much effort as 3.
Alex