service change 200 to 400 amp w/sub panel motel

[TROY M BRIDGE]

I PONDERED UPON THIS JOB A MOTEL WITH 16 GUEST SUITES W/ 180 SQ FT PER ROOM THATS 2880 SQ FT PLUS THE MANAGERS OFFICE OF 750 SQ FT FOR A TOTAL OF 3.630 SQ FT. IT CAUGHT ON FIRE AND HAS A REMODEL PERMIT. NOW THE OLD SERVICE WAS 200 AMP WITH PULL OUT FUSES GOING TO THE PANEL THE PANEL WAS WIRED WITH 250 AWG AND OLY HAD 10/20 CIRCITS BUT WAS DOUBLED UP TO MAKE 40 OVERLOADED AND NOW THAT WE ARE DOING THE HOLE BUILING STRIIPED W/ THE WALLS AND ROOF REMAING , I HAVE 5 BRANCH CIRCUITS TO EACH ROOM ( GFI)(220-AC)(-MICRO/ REF)(RECEP) (SMOKE DET) (OUT SIDE LIGHTS) ECT AND LIGHTING PER SQ FT ,THATS 80 CIR , NOT INCLUDING THE MANAGERS OFFICE ON 100 AMP . SO IT NEEDS A 400AMP PANEL WITH A 200 BREAKER FOR THE SUB PANEL RESEDENTAL NEC CLEARLY STATE THAT GUEST SUITES ARE REFORED BACK TO AS RESEDENTIAL I MAY BE WRONG BUT THE MOTEL IS DONE IN ROMEX. SO I WENT TO THE CITY INSPECTORS OFFICE AND TOLD THEM WHAT WAS UP THEY SAID THAT I COULD KEEP THE 400 AMP PANEL BUT I HAD TO CHANGE THE MAIN BREAKER FROM 10.000 TO 42.000 IAC WELL THAT IS NOT GOING VERY WELL NOT HAPPENNING IVE CONTACTED MANY ELECTRICAL SUPPLY PLACES NO GOOD, SO CAN I BUY A PANEL WITH PULL OUT FUSES RATED ABOVE OR AT 42.000 IAC RATED AND RUN TWO SUB PANELS OF OF THE TWO FUSES MAKING TWO 200 PANELS. I SHOULD BE ALLOWED TO USE THE RESEDENTAL PANEL THANK YOU