The fact that you are wondering about kits as opposed to ARF's gives me the impression that you do not have much, if any, kit building experience. I have been building kits since 1934 and of all my aircraft and boats I have only tried ARF's twice. They are much simpler for a non-experienced builder/pilot. The newer ARF's are very well built and assemble fairly easily. Check with someone who has built the ARF you are interested in to find out about any assembly problems and how the thing flys.
By the same token check with an experienced kit builder about the airplane you would like to build. Ask the same questions you would about an ARF. Some kits require a lot more skill than others. Get a simple trainer for a start. Consider what radio and engine you plan to use or what you will need for an electric.
Kits may be cheaper but that is not always the criteria for success.
Good luck whatever you choose.