That is definitely a route I will go (eventually) if I find the electrical gives me fits. I would do it all hydraulic first time around if money was no object, but it is.
The reason I went electric is because so many have and have had good luck with it. Parts are cheaper by quite a shot, too. For instance, I've got 2 wheelchair motors and 2 - 55 amp, reversible variable speed control boards to run them for $115 altogether, brand new. All I'm lacking is some wire, an outdoor electrical project box, several sprockets, and some fabbing. I'll have a completely motorized carriage that saves my shoulders from more agony (mostly from the up/down). I won't have $300 in motorizing the carriage I don't think. I've been working with wires and hoses and chains and shafts and all things mechanical and electrical enough years that I know what works and what doesn't so at least I have that going for me. I'd be quite tentative if I was completely new at all this, I know that. I thank God that he gave me the brain I've got, messed up as it is (memory/dyslexic when thinking/building in 3D), because it allows me to save me and my family thousands of dollars every year.
I have thought about documenting it with pics to show folks how simple things can be and still work OK. I've never done this. Ever. It will be a challenge to remember to take pics.