|Darksol the Painbringer|
My player wanted to know if he could add a single Metamagic feat to his arcane-bonded staff? His thought was if he could do that, and then take a couple Metamagic feats himself, he could avoid the need for a rod, and thus avoid having both hands full.
I'm not opposed to the idea, but I wanted to make sure if was allowed under the rules first. After that, I just wasn't sure how it would be priced.
As far as simply taking the effects of a Metamagic Rod and converting it into a staff, I don't personally see an issue other than conflicting mechanics. Staves almost always require a spell of some sort (usually two minimum), and charges to maintain it, whereas Rods don't have any of that sort of thing.
I mean, you could try to combine the two into a single item, but I imagine it would fall under the rules regarding combining magic item effects. Needless to say, it requires GM FIAT (which it appears you are the GM), and it gets expensive, fast, though there are a couple low level (and low cost) staves that can be pretty useful and manageable within the spell cost.
Metamagic Rods still require a hand for use, and the same goes for a Staff. If anything, a Staff can be argued to require two hands (though I don't see why a character needs two hands to use a Staff's spells or other abilities, though if he wants to attack with it, he'd need two hands), and Wands usually offer better consistency options without all that excess money requirement, so it's a down-grade either way.