Not difficult to get started loading and straight wall cases are easy to load, using carbide dies.
There are folks around who cast bullets for the .45 Colt for sale.
A thousand large pistol primers and a bottle of Trail Boss powder will go a long way
You can start with a Lee Loader, Carbide dies, a hand primer, scoops, a trickle charger and a scale.
If you have enough empty brass saved, you can load a little at your leisure, when ever you have free time.
When I started, I did a lot of that during the long winter evenings.
Have fun.
An alternative may be to get other .45 Colt shooters together for a bulk order of 5000 rounds from SFRC, who should be able to arrange a run from Wolf Bullets of Kingston.