I want to start making my own cables but don't know what testers are best?"
There is no business case for a $5000 tester to make $3 cables.
The testers referenced above are for testing installations, not patch cables. If you are doing installations and need a tester then it will also come in handy for testing custom patch cables. Cart before horse...
If you are going to be working on network cables you do need some type of tester. These start at less than $100 for a basic wiremap unit with LEDs. The next level is under $500 and has fault finding and distance measurement (my fav is the MicroScanner Pro or get a used Pentascanner). At around $1000 you can get some of the Test-um type units that have neat features but use non-standards based tests. Finally at over $5k you can get the big Flukes and Agilents.
There are a lot of choices out there. It really depends on what type of work you are looking to do, your skill level and the cash flow of your business.
"I would pull 24 feet of solid cable, terminate them to keystone jacks or a keystone jack on one end patch panel on the other . then use two 3' patch cords .(or 7') "
Bull$hit. The guy needs a 27' patch cable, not a 27' permanent installation plus two patch cords.
What you are advocating is more expensive and less reliable, due to the increased connector count, than a well made custom cable.
Mindless adherence to dogma...