To build things away from your base, use sandbags in a chain. Wait long enough and you could have your own prison!
As long as you don't go near the cells with military units, they won't shoot down the sand bags. You can then surround the units with sand bags and trap them inside. If you surround your entire base and the nearest tiberium field with sand bags, opposing units approaching your base, will stop and not shoot down the sand bags.
Sell the repair pad and the five men will be sold for full price! Then package five men within the transport before placing it on the repair pad.
For instance, when playing as the Global Defense Initiative (GDI), build a repair pad and transport. To sell soldiers, place them near (or within) the items that are being sold.