Does a new manufactured home on permanent foundation need a shutoff within 30ft?
NEC 550.32(A) Mobile Home Service Equipment. ...in sight from and not more than 9.0m (30ft) from the exterior wall...

Note the NEC in 550.2 says "For the purpose of this Code...the term mobile home includes manufactured homes and excludes park trailers..."

I would expect the ufer ground to be  good, but you probably should check with the local inspecting authority to make sure they don't have some odd interpretation or specific legacy additional requirement for mobiles. Other bonding requirements are usually factory performed, but you should check.

It could be interpreted that the 30A RV receptacle renders the available power at the pedestal for the mobile to be less than the minimum requirement on the HUD label. You could probably do a load calc if a "modular" home, but not a "mobile".