I used to do my own 35mm E-6 processing. My experience was that it was more economical than commercial processing if I shot enough film to be able to use a batch of chemicals to exhaustion within the relatively short shelf-life of the chemicals. It was also a simple (albeit boring) process - no more difficult than black & white processing.
The only serious challenge was the need to maintain a reasonably consistent temperature (around 100 deg F). I used a large plastic bin as a tempering bath and found that this was close enough for my needs.