Sure you can use a lawn tractor with a bagger to do the leaf clean up. I do it every year. I've found it's better to take the bagger and the shute off at first and just drive around grinding the leaves up....reducing the volume. Once they're reduced you can then put the bagger back on and suck them up. If you don't grind them up first you'll just pack the bags every 2 seconds with full sized leaves and that doesn't work out. Also, for your sized lawn you will want to keep to a 2 blade mower deck. Do not go to a 3 blade deck because you don't need the extra width and a 2 blade deck flows better for bagging.

If u are thinking of a swepper on the tractor some will go over the top and it will fill up fast

There are many ways to do leaf control with a tractor. From just mulching on the cheap end to a Cyclone rake for $1500+. My previous home (1 yr ago) had 70 trees in the front yard and I chose to plant grass and pickup all the leaves each fall. Bought a Cyclone Rake and it is a super tool. All kinds of tools to put on your tractor are out there - how many leaves are you talking about? For someone charging $500 you might need a tow behind vacuum rake like the Cyclone.

Agree with "back in the saddle," also consider getting mulching blades which will then more finely chop the leaves, lessening the emptying cycle. Even if you don't have a "mulching" deck, mulching blades will still chop smaller than conventional blades. Also, you can use them for just cutting grass.

a riding mower for .3 acres is overkill. Unless you can justify the cost by additional usage other than mowing. I'd guess a rider with a bagger would be about $1500-2000, so do the math. You might also investigate renting something once a year, provided you have a way to transport it.

Good luck,

Ev

Short answer: Yes.
Longer answer: For less than 1/3 acre?

I use my mower as a self propelled leaf blower to herd leaves around. I found mulching our oak leaves impractical and too acid for lawns if mulched.