OK here's where the extra tool cost comes into play. You will need a crimp tool for these terminals. However, as usual, I have located a very good value in an MC-4 crimping tool. A pro who does this every day for a living would not use this tool because it is more tedious and time consuming than the $1000.00 versions, but for the money this tools preforms very, very well.
I bought this MC-4 die set and crimping frame from Pro's Kit:
Pro's Kit Lunar Series Crimp Frame (LINK)
Pro's Kit Lunar Series MC-4 Die Set (LINK)
All together the crimp frame and die set will run you $51.52 a real STEAL for an MC-4 crimp tool! Plus you will now be able to buy more individual die sets for other crimping jobs.