All depends on what you're using the unit for ... part time, weekend warrior ... full time ... etc.
In our plan to FT, we spent a lot of time in each of the units we were considering ... we quickly realized a minimum of 3 slides was necessary.
We were very fortunate to find our current home that was built by a top manufacturer in the day and very well maintained .... and we couldn't be happier. it fits our needs ...... and a everything we need is totally access-able when closed up.
Good luck with your search ......
Hal & Jackie .... 03 TS Select 45DS01
02 Haulmark 20' Edge .... 02 Corvette Rdstr