recreational vehicle

[Bepo]

here is the project I'm trying to build a recreational vehicle with motive
I apologize in advance for any errors in language use google traslator because I'm Italian I post some photos







I would make the truck and the cascadia of tamiya

help me since I am not mote preatico to decide which radio I use that serves a 6 ch 2.4ghz but need to trim the analog or digital ones are fine too?
to be able to also use the MFC1 or MFC3 for sounds?
then I'm stuck in the wheel axles do not understand what pzzzo as a suspension .. you take a photo of the piece that I could use?
thanks for any replies