i am looking for a trailer, i have been looking at a trailer that just has a dressing room, would i be better off to get a trailer with living quarters or try to fix that one like i want it?

Welcome to the boards!
If you're okay with just the dressing room, maybe start off that way and slowly take your time adding a LQ.  Or, what we've done, is buy a trailer with partial LQ done (AC, water tank, micro, etc) and finished it ourselves.
It's all personal preference.  I will say that I love having water.  I have an outside spigot for the horses and a sink inside for me!

Check out www.jbjconversions.com we are in Georgia and may be close enough to you. We can put a package in any trailer for you at a reasonable price, not a dealers upcharged price. We will work with you to custom a package that is just right for you, big or small. Or we can help you with questions with your project.

Good luck trailer shopping...