Hi! We are starting our pool build on Tuesday and just had a quick question. We are building a 18 X 30 pool with an 8 foot spa. We are also adding a solar system. There will be 5 jets in the spa. Our builder says we only need a 2 hp pump for this set up. Another contractor had said we would need a booster pump. Who is right? Will the one 2 hp pump be enough for the pool, spa and solar?