Roll off truck questions

Is there any advantages with a cabiver? Found a 02 Mack cabiver Rolloff with a tarp system that looks to be in decent shape. But wasn’t sure if there’s an advantage with the cabiver vs standard model I’m guessing the wheelbase would be pretty close so no really advantage?

 

I’m looking for a versatile truck that will be able to handle 10-30/ possibly 40 yard cans
would a truck like this setup work? I imagine you can add the tie downs on the Rails to tie down smaller cans.
https://www.commercialtrucktrader.com/listing/2005-MACK-CV713-5007304634

I know a smaller single axle truck would be best for smaller tighter delivers

 

Can you add those flip up locks? Or is a speed binder the only option?
I’m trying to find a truck something like that. But just an idea of what I’m looking for.
Something like that could haul 10-30/40 yard dumpsters?

 

I see it now. I know it’s not a one size fits all truck but I went to get myself in a good position to be able to deliver different size cans. When looking for trucks how many miles is too many? I see a lot with 700k plus but I imagine those will need a lot of engine work and work in the future. Should I look for something with 400-500k miles?
Thanks

 

So I’m guessing a lot of the 20k range trucks in finding like this
1997 MACK RD688
should be avoided? I’ve been on commrricaltrucktrader truck paper searching and isn’t much under 30k, more than that I’d have to finance and I’m trying to pay cash getting into the business.
Or something like this?
1993 MACK CL 713 | eBay