I am installing a IG vinyl pool and I faced the same delema. Electricians wanted to charge 2600. So I am doing it my self. My pool has resin walls too. I had to make a bonding grid b/c there was no metal. Code says to run at least #8 solid bare copper in a ring around the pool to make your grid. Jumper all metal to this ie; pieces of metal coping, metal rails , pool light niche, metal ladder and lug on pool motor. I bought a code book from home depot and it explains it pretty well. Lot of info also if you google "pool electrical". Get it inspected if you do it your self. One thing to do to the work but you want to make sure you do it right! water and electricity do not mix. Chris