cost will depend on how much you want to spend. also, how much you want to shoot.
factors to consider:
1. YOUR TIME. Time = $$$$$. How much do YOU value YOUR time?
2. how much do you plan on shooting? 100 rounds per week, weekend or day? or more?
3. You dont "save" any $$ either by reloading. Why? cuz you spend it on other reloading supplies.
4. get a book on reloading like the "ABCs of Reloading". Even if you decide to not reload, it will give you an idea on whats involved and chances are, you will probably reload later especially when you buy more guns like that 45acp. its also give you the vocabulary so you can ask intelligent questions and know the terminology/meaning.
Look at Midwayusa.com. they have alot of reloading supplies and "starter" kits. Most of the kits are single stage presses or turrets. Also, you will need to buy some other tools since most if not all of the starter kits done include everything you will need.
Look also at Dillonprecision.com. he sells some of the more expensive equipment. you can get an idea on the cost of progressive presses. (note the "progressive" terminology)
once you know some of the terminology, you can google for the "reloading" calculator. it will give you an idea on how much each round costs. the catch is, you need to know the prices and what is used for what.
a comment. i can tell you how much i save, but it wont be what you will. why? cuz ive been buying reloading components for 30 years and have stockpiled some of the components. If you havent noticed, that during the last few years, ammo prices have gone up. well, during that time, so did the reloading components.
just an example. I had purchased primers < $ 0.01 each. Now, if you are lucky, they will cost you $ 0.03 each. it all adds up.
a few hints if you choose to venture into reloading.
1. SAVE YOUR BRASS. Even if you dont reload now. Why. Cuz you can sell it. it doesnt have a shelf life or expiration date. just keep them in a clean, dry for storage.
2. BUY IN BULK. dont MO 1 lb of powder. or 100 primers. Think BULK. Why? Cuz if you MO powder and/or primers, there is a HAZMAT fee. Its approx $25.00 per shipping box. Heres another gotcha. They CANT ship Primers & Powder togeather! If you buy in BULK, the cost of the HAZMAT is spreadout over the whole shipment. IF you buy the primers or Powder locally, you wont have to deal with the HAZMAT fee.
3. Bullets can be expensive since they are heavy. If you can find someone that will eat the shipping if you order x amount of bullets, go with them. If you can find them locally, its good to.
4. You will need space to do the reloading. Preferably no carpet under the bench/area! You will need a good sturdy bench to attach the press too.
5. Keep a reloading log. Why? cuz it will allow you to replicate a load long after you fogot the details. It will also keep you from making the same bad load too.