Keep a lookout for a cheap Happy Cooker in your area (often advertised as a Weber). If it has a decent internal ash pan still, buy it for the ash pan.
Back in the day, I used to just pull the leftover large coals from on the grate & then lifter her up and dump the ashes into a METAL garbage can (just in case there was any embers). Sometimes, just dumped it upside down on the ground in a less conspicuous place in the back yard.
I've read some say they use their hand or a little broom thing to sweep it through the daisy wheel holes (presumably so that the wind takes a decent portion away before they have to get rid of what falls on the ash pan).
Are there any hot tips for ash management on these original, non-one touch kettles?