Complete Conversion Box Truck to RV

Need to complete conversion on a 14 foot box truck to RV. Original builder retired recently. Work can be piecemeal or contracted for whole project.

Job description:

#1 110 & 12 volt wiring remaining: connect bundle of labeled wiring to solar system & outlets;

#2 install solar panels on roof & place charge controller, inverter, fuses etc;

#3 install water tank & run line to sink;

#4 run propane lines from exterior wall's bumper to stove & fridge;

#5 isolator from alternator to charge house batteries;

#6 telescoping bed frame & motor;

#7 fabricate a step for cab access x 2;

#8 any suggestions are welcomed. Will pay in cash.