Even if you're living in a studio suite size place you can set up a minimal "one storage tote" reloading setup that fits in the space needed by four shoe boxes. And THAT is for a small bench style.
I know you asked about where to buy the ammo. But even at the lowest cost you can find for .45Colt AND with free shipping you will still be able to reload for less than half the cost per round.
Up here in Canada where all our stuff for reloading is about a third again as expensive I've got a buddy that comes over to use my press. He's reloading 200gn LRNFP bullets we buy for $66/500 from a commercial caster along with the rest of the stuff needed for 22cents a round. Even if you buy your bullets instead of melting and casting your own I strongly suspect you could cut that to around 15'ish cents per round in the US.
The small Lee progressive turret press he's using along with the other bits to reload will fit into a medium size storage tote and go into a closet. The press is mounted to a hunk of 2x10 which we're currently clamping to a hunk of the counter in my laundry room pending my new shop renos being completed. The press along with the F clamps and other various bits and pieces needed would fit into a plastic storage tote about 12x18x10 with room to spare. Although to do this the handle would need to be removed as it sticks out at an odd angle.
Once you get a little experience in reloading the time from the tote coming out of the closet to the first bullet rolling off into the catch bin would be no more than 15 minutes to set up, fill the powder and primer holders, check the charge weight to confirm nothing moved and then to start loading progressively. Cleanup and tear down from the last bullet to the closet door being closed to put the whole thing away would be about the same. In between you can easily produce 200 rounds an hour after even a little practice. My best at cranking out .38Spl on this same rig is to use up 100 primers in just over 15 minutes So around 350 an hour. And that was not a panicy pace. It left me time to watch that the primers were indexing correctly and with a sort of double bump on the lever to ensure the primers were seated well.
If you simply do not want to reload that's fine. But please don't try to convince us that you can't reload for reasons of room or ability. Like any new skill it's easy and obvious after a bit of training and time at the job. And we've shown that a lack of space is not an issue. A lack of TIME because you're working too much overtime is about the only truly good excuse to not get into re-loading. But then you're making enough extra money from all that overtime that you can't complain about the outragious prices for .45Colt, right?....