The other thing to think about is even allow an RG to be rented solo. I'm hearing the liability would be considerably cheaper if it were mandatory dual on RGs. Any word on that one?
I know some here hate it that schools and FBOs place such limits on rentals. But, we all know insurance companies have a huge say what happens in the flight training industry.
There are multiple schools/clubs in Atlanta that rent retractable planes non-dual. Limiting that whether for insurance or "our focus is training" will reduce your rentals and training to only those that want to check off the box on their training. I've seen schools that have twins for "dual only" and I just keep looking as I'd want to travel with it. For those just wanting the training it's a perfect fit. What does your school/club want to do?
I talked to a new club/school a couple of weeks ago and they want 300 hours to fly an Arrow solo. That's what their insurance limits are, but that's also what they bought (i.e. there are other insurance options). Other places in the metro area have far lower limits; I got my complex sign-off at 143 hrs and flew it solo w/ 145 hrs. What I found odd is that the requirements for flying their Seneca are the same, other than a multi engine rating requirement. I may do my multi engine training there as they're nearby and rent the Seneca at a low dry rate.