I briefly researched this. You might save a few dollars but the time and space investment will offset that and then some. You're also handling toxic chemicals which is never fun and unfortunately the results are average at best from what I've seen compared to what a professional plater can do for you. There's also the problem of large parts which require large baths...
If you were to persist you might be able to reach a stage where you're outputting consistent quality results but the amount of parts you'd need plated for a single car restoration is not enough to achieve this. If you anticipate plating other items, helping out friends and possibly doing more restorations yourself in the future, you can probably justify the time.