as much as i would like to see this; I'm thinking it might be a disaster for the calbs's because the chemistry's of the different batteries just don't match up. perhaps a series string of fla then calb pack then fla and parallel those strings.
You can parallel Lead Acid and you can Parallel Lithium but I would not mix chemistries in series or parallel.Parallel anything gets interesting. Paralleling different power sources is even more. But, after charging them separately , when that isolating contractor cuts back in, the fun really starts.
One will be charging the other, always, until equilibrium is met.
Series is easier. Just monitor the smallest capacity cell and charge/discharge to that.
Parallel works fine but you have to know what you are doing.You can parallel Lead Acid and you can Parallel Lithium but I would not mix chemistries in series or parallel.
Lead along side NiMH is not a good idea. Yes it can be done but introduces a high level of complex issues.Parallel works fine but you have to know what you are doing.
I wouldn't consider this as a solution for anything because you still have lead acid batteries in your car and you still have all of their disadvantages, namely the low energy density and high weight. The only thing people see with LA is the illusion of saving money.
Not sure what you have in mind for meters, but I have one of these Doc Wattson Meters, and its pretty neat for the price. It doesn't log, so you have to manually record data at regular intervals. But for tests like this, you'll probably be monitoring it anyway...., and I decided I need some more meters before I'm ready to go.