Booth vs table chairs really is a whatever you prefer decision.
Two couches vs couches and a few recliners, is also the same.
(Yes, those two statements are 'Duh!' and really not that helpful to you
Hopefully this will help. When we were shopping for our retirement (Say vs out and about with a family.) coach, we focused on 'Traveling Comfort for Two' vs the new times we'd have guests staying with us. (We actually joke, whenever we're asked 'How many coaches can your coach sleep?' - we answer 2!). As we modified out coach to be 'our's', we actually removed out fold out couch, and installed a J-Lounge for more in coach storage (Under the seat cushion of the J-Lounge, is our bulk storage pantry, and 'wine cellar'
!). We bought two matching recliners, as we both find recliners to be more comfortable for longer periods of sitting. We do mix it up, I'd guess we are 70-80% recliner, and then mix it up with the J-Lounge the balance of the time.
We liked the table with four chairs. As two of our chairs are folded up, and stored in the closet against the wall behind the hanging clothes. We can pull them out the few times we need them, the balance of the time two chairs take up less floor space. On our coach, we have a buffet like cabinet the the table slides recesses into part of the way, handy when the slides are in, of more floor space. And those cabinets store lots and are easily accessible, with a bit of exercise getting to the cabinet beneath the table. (We keep batteries, and other items not needed frequently, in that specific cabinet.) Yes, most booths provide storage too, usually with slide out drawers. And the as noted, most do provide an additional bed. Space too.
We also find the four chairs provide more flexible and sociable seating capability, then the booth, where two people are usually needing to turn uncomfortably, if they can, to face a conversation space or TV in the front zone of a coach. (Or visa versa, if it is a coach with a TV on the kitchen slide out wall.) Being able to pull the chairs out and set them up where you want them, is a bonus for our usage.
For sleeping guests usually our daughter and her spouse, or sometimes my wife's Mom will join us for a short get away weekend. We have the J-Lounge (MIL likes this as her sleeping area, or will also sometimes be found snoring away comfortably in one of the recliners
!) And a good quality blow up double/queen (We went with double, as we like our daughter and spouse, but did not want it become too comfortable for longer term stays
Now, them grandkids can be a bit different - so sure understand wanting to account for them with a sleeping area
! But, I believe they'd get a kick out of the air mattress too. (On, and amazing the ease and speed of both filling up, and then deflating, with the assistance of the great electric air pumps!) Less then 5 minutes both ways, including putting the bedding on, and folding it up the next day.
In my earlier post, I believe I suggested reserving budget for 'making the coach your's' when you get it. Maybe updating electronics to newer TV's, changing some cabinets, flooring materials, chairs couches, residential fridge if desired, valances, install LED lighting if boon docking, etc., etc. Buying a higher quality used coach that fits you floor layout desires, provides a good foundation to allow and warrant future modifications. Sort of like buying a house in the right size and right location, and them making remodeling mod's to fit your specific likes and needs.
If planning to spend months at at time, or 365 days a year, in a coach - means your setting this up as your home.
Best of ongoing luck to you,