If you don't have permanent corrals (we do not), make sure that you at least have a good number of heavy corral panels. They are useful as you can move them to where you need them, whether to keep the cattle in a certain area or to help direct them.
Strong wire is right...if it is too light you will forever be fixing it. Having more than one wire is important for a good shock (2 or more strands). You only need to have one hot.
Get a good fencer. Not all work as well as advertised. We had one that should have worked for a smaller pasture, but we had to return it to get one that was capable of doing more miles of fence than we will likely ever have. Now we have no issues.
Yes...a good truck and a LOW livestock trailer are important. If they will readily come to grain, that loading chute can be avoided, as you can lure them into a trailer with a tasty treat. I have seen this done with a bull in an open pasture. It took time, but nobody got hurt, the animal was calm and everyone was happy. We have had success doing things this way as well.
If you have a friendly neighbor who is willing to lend you his trailer or his help from time to time, that can help when you are starting...but it is best to have your own.
Another note on the trailer...it is better if it has an panic/escape door (I can't remember the proper name) toward the front end of the trailer. Safety is important.
Cattle ARE expensive right now...dairy and beef. I doubt that you would get your money back from dairy steers right now (inputs are very high), and actually I would think twice about buying beef calves too unless you have found a good deal that is an honest one (no hidden medical problems, bad temperament, etc). The market is stupidly high for any calves here and even though in MB we have hay, the prices for that are high as well and it is worse the further west you go.
Considering the way this discussion is going, what do you have ready?